CVE-2026-75874
Sandbox escape in the Remote Settings Client component
CVE-2026-75874 is fixed in 179 products on 3 platforms, first by Mozilla Firefox 154.0, released August 12, 2026. 200 other affected products have no fix yet. It is not reported as exploited. Patch Radar priority: Urgent.
UrgentFixed on 3 platforms
CVSS
10.0
critical
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0046
39th percentile
Sandbox escape in the Remote Settings Client component. This vulnerability was fixed in Firefox 154, Thunderbird 154, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 140.15, and Thunderbird 153.2.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Firefox Developer Edition (en-US) | 156.0 | Firefox Developer Edition (en-US) 156.0 | Sep 2, 2026 |
| Mozilla Firefox (ach) | 154.0 | Mozilla Firefox (ach) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (af) | 154.0 | Mozilla Firefox (af) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (an) | 154.0 | Mozilla Firefox (an) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (ar) | 154.0 | Mozilla Firefox (ar) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (ast) | 154.0 | Mozilla Firefox (ast) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (az) | 154.0 | Mozilla Firefox (az) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (be) | 154.0 | Mozilla Firefox (be) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (bg) | 154.0 | Mozilla Firefox (bg) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (bn) | 154.0 | Mozilla Firefox (bn) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (br) | 154.0 | Mozilla Firefox (br) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (bs) | 154.0 | Mozilla Firefox (bs) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (ca) | 154.0 | Mozilla Firefox (ca) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (ca-valencia) | 154.0 | Mozilla Firefox (ca-valencia) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (cak) | 154.0 | Mozilla Firefox (cak) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (cs) | 154.0 | Mozilla Firefox (cs) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (cy) | 154.0 | Mozilla Firefox (cy) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (da) | 154.0 | Mozilla Firefox (da) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (de) | 154.0 | Mozilla Firefox (de) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (dsb) | 154.0 | Mozilla Firefox (dsb) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (el) | 154.0 | Mozilla Firefox (el) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (en-CA) | 154.0 | Mozilla Firefox (en-CA) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (en-GB) | 154.0 | Mozilla Firefox (en-GB) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (en-US) | 154.0 | Mozilla Firefox (en-US) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (eo) | 154.0 | Mozilla Firefox (eo) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (es-AR) | 154.0 | Mozilla Firefox (es-AR) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (es-CL) | 154.0 | Mozilla Firefox (es-CL) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (es-ES) | 154.0 | Mozilla Firefox (es-ES) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (es-MX) | 154.0 | Mozilla Firefox (es-MX) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (et) | 154.0 | Mozilla Firefox (et) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (eu) | 154.0 | Mozilla Firefox (eu) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (fa) | 154.0 | Mozilla Firefox (fa) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (ff) | 154.0 | Mozilla Firefox (ff) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (fi) | 154.0 | Mozilla Firefox (fi) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (fr) | 154.0 | Mozilla Firefox (fr) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (fur) | 154.0 | Mozilla Firefox (fur) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (fy-NL) | 154.0 | Mozilla Firefox (fy-NL) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (ga-IE) | 154.0 | Mozilla Firefox (ga-IE) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (gd) | 154.0 | Mozilla Firefox (gd) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (gl) | 154.0 | Mozilla Firefox (gl) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (gn) | 154.0 | Mozilla Firefox (gn) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (gu-IN) | 154.0 | Mozilla Firefox (gu-IN) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (he) | 154.0 | Mozilla Firefox (he) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (hi-IN) | 154.0 | Mozilla Firefox (hi-IN) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (hr) | 154.0 | Mozilla Firefox (hr) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (hsb) | 154.0 | Mozilla Firefox (hsb) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (hu) | 154.0 | Mozilla Firefox (hu) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (hy-AM) | 154.0 | Mozilla Firefox (hy-AM) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (ia) | 154.0 | Mozilla Firefox (ia) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (id) | 154.0 | Mozilla Firefox (id) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (is) | 154.0 | Mozilla Firefox (is) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (it) | 154.0 | Mozilla Firefox (it) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (ja) | 154.0 | Mozilla Firefox (ja) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (ka) | 154.0 | Mozilla Firefox (ka) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (kab) | 154.0 | Mozilla Firefox (kab) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (kk) | 154.0 | Mozilla Firefox (kk) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (km) | 154.0 | Mozilla Firefox (km) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (kn) | 154.0 | Mozilla Firefox (kn) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (ko) | 154.0 | Mozilla Firefox (ko) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (lij) | 154.0 | Mozilla Firefox (lij) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (lt) | 154.0 | Mozilla Firefox (lt) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (lv) | 154.0 | Mozilla Firefox (lv) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (mk) | 154.0 | Mozilla Firefox (mk) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (mr) | 154.0 | Mozilla Firefox (mr) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (ms) | 154.0 | Mozilla Firefox (ms) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (my) | 154.0 | Mozilla Firefox (my) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (nb-NO) | 154.0 | Mozilla Firefox (nb-NO) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (ne-NP) | 154.0 | Mozilla Firefox (ne-NP) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (nl) | 154.0 | Mozilla Firefox (nl) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (nn-NO) | 154.0 | Mozilla Firefox (nn-NO) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (oc) | 154.0 | Mozilla Firefox (oc) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (pa-IN) | 154.0 | Mozilla Firefox (pa-IN) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (pl) | 154.0 | Mozilla Firefox (pl) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (pt-BR) | 154.0 | Mozilla Firefox (pt-BR) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (pt-PT) | 154.0 | Mozilla Firefox (pt-PT) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (rm) | 154.0 | Mozilla Firefox (rm) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (ro) | 154.0 | Mozilla Firefox (ro) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (ru) | 154.0 | Mozilla Firefox (ru) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (sc) | 154.0 | Mozilla Firefox (sc) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (sco) | 154.0 | Mozilla Firefox (sco) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (si) | 154.0 | Mozilla Firefox (si) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (sk) | 154.0 | Mozilla Firefox (sk) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (sl) | 154.0 | Mozilla Firefox (sl) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (son) | 154.0 | Mozilla Firefox (son) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (sq) | 154.0 | Mozilla Firefox (sq) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (sr) | 154.0 | Mozilla Firefox (sr) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (sv-SE) | 154.0 | Mozilla Firefox (sv-SE) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (szl) | 154.0 | Mozilla Firefox (szl) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (ta) | 154.0 | Mozilla Firefox (ta) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (te) | 154.0 | Mozilla Firefox (te) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (tg) | 154.0 | Mozilla Firefox (tg) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (th) | 154.0 | Mozilla Firefox (th) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (tl) | 154.0 | Mozilla Firefox (tl) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (tr) | 154.0 | Mozilla Firefox (tr) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (trs) | 154.0 | Mozilla Firefox (trs) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (uk) | 154.0 | Mozilla Firefox (uk) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (ur) | 154.0 | Mozilla Firefox (ur) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (uz) | 154.0 | Mozilla Firefox (uz) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (vi) | 154.0 | Mozilla Firefox (vi) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (xh) | 154.0 | Mozilla Firefox (xh) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (zh-CN) | 154.0 | Mozilla Firefox (zh-CN) 154.0 | Aug 18, 2026 |
| Mozilla Firefox (zh-TW) | 154.0 | Mozilla Firefox (zh-TW) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (af) | 154.0 | Mozilla Thunderbird (af) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (ar) | 154.0 | Mozilla Thunderbird (ar) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (ast) | 154.0 | Mozilla Thunderbird (ast) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (be) | 154.0 | Mozilla Thunderbird (be) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (bg) | 154.0 | Mozilla Thunderbird (bg) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (br) | 154.0 | Mozilla Thunderbird (br) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (ca) | 154.0 | Mozilla Thunderbird (ca) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (cak) | 154.0 | Mozilla Thunderbird (cak) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (cs) | 154.0 | Mozilla Thunderbird (cs) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (cy) | 154.0 | Mozilla Thunderbird (cy) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (da) | 154.0 | Mozilla Thunderbird (da) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (de) | 154.0 | Mozilla Thunderbird (de) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (dsb) | 154.0 | Mozilla Thunderbird (dsb) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (el) | 154.0 | Mozilla Thunderbird (el) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (en-CA) | 154.0 | Mozilla Thunderbird (en-CA) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (en-GB) | 154.0 | Mozilla Thunderbird (en-GB) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (en-US) | 154.0 | Mozilla Thunderbird (en-US) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (es-AR) | 154.0 | Mozilla Thunderbird (es-AR) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (es-ES) | 154.0 | Mozilla Thunderbird (es-ES) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (es-MX) | 154.0 | Mozilla Thunderbird (es-MX) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (et) | 154.0 | Mozilla Thunderbird (et) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (eu) | 154.0 | Mozilla Thunderbird (eu) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (fi) | 154.0 | Mozilla Thunderbird (fi) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (fr) | 154.0 | Mozilla Thunderbird (fr) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (fy-NL) | 154.0 | Mozilla Thunderbird (fy-NL) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (ga-IE) | 154.0 | Mozilla Thunderbird (ga-IE) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (gd) | 154.0 | Mozilla Thunderbird (gd) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (gl) | 154.0 | Mozilla Thunderbird (gl) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (he) | 154.0 | Mozilla Thunderbird (he) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (hr) | 154.0 | Mozilla Thunderbird (hr) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (hsb) | 154.0 | Mozilla Thunderbird (hsb) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (hu) | 154.0 | Mozilla Thunderbird (hu) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (hy-AM) | 154.0 | Mozilla Thunderbird (hy-AM) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (id) | 154.0 | Mozilla Thunderbird (id) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (is) | 154.0 | Mozilla Thunderbird (is) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (it) | 154.0 | Mozilla Thunderbird (it) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (ja) | 154.0 | Mozilla Thunderbird (ja) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (ka) | 154.0 | Mozilla Thunderbird (ka) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (kab) | 154.0 | Mozilla Thunderbird (kab) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (kk) | 154.0 | Mozilla Thunderbird (kk) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (ko) | 154.0 | Mozilla Thunderbird (ko) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (lt) | 154.0 | Mozilla Thunderbird (lt) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (lv) | 154.0 | Mozilla Thunderbird (lv) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (ms) | 154.0 | Mozilla Thunderbird (ms) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (nb-NO) | 154.0 | Mozilla Thunderbird (nb-NO) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (nl) | 154.0 | Mozilla Thunderbird (nl) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (nn-NO) | 154.0 | Mozilla Thunderbird (nn-NO) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (pa-IN) | 154.0 | Mozilla Thunderbird (pa-IN) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (pl) | 154.0 | Mozilla Thunderbird (pl) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (pt-BR) | 154.0 | Mozilla Thunderbird (pt-BR) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (pt-PT) | 154.0 | Mozilla Thunderbird (pt-PT) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (rm) | 154.0 | Mozilla Thunderbird (rm) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (ro) | 154.0 | Mozilla Thunderbird (ro) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (ru) | 154.0 | Mozilla Thunderbird (ru) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (sk) | 154.0 | Mozilla Thunderbird (sk) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (sl) | 154.0 | Mozilla Thunderbird (sl) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (sq) | 154.0 | Mozilla Thunderbird (sq) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (sr) | 154.0 | Mozilla Thunderbird (sr) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (sv-SE) | 154.0 | Mozilla Thunderbird (sv-SE) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (th) | 154.0 | Mozilla Thunderbird (th) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (tr) | 154.0 | Mozilla Thunderbird (tr) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (uk) | 154.0 | Mozilla Thunderbird (uk) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (uz) | 154.0 | Mozilla Thunderbird (uz) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (vi) | 154.0 | Mozilla Thunderbird (vi) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (zh-CN) | 154.0 | Mozilla Thunderbird (zh-CN) 154.0 | Aug 18, 2026 |
| Mozilla Thunderbird (zh-TW) | 154.0 | Mozilla Thunderbird (zh-TW) 154.0 | Aug 18, 2026 |
| macOS | |||
| Mozilla Firefox | 154.0 | Mozilla Firefox 154.0 | Aug 12, 2026 |
| Mozilla Thunderbird | 154.0 | Mozilla Thunderbird 154.0 | Aug 17, 2026 |
| Linux | |||
| MozillaFirefox · opensuse-leap 16.0 | 153.2.0-160000.1.1 | OPENSUSE-SU-2026:21853-1 | Sep 15, 2026 |
| MozillaFirefox · sles 15.6 | 153.2.0-150400.157.5.1 | SUSE-SU-2026:4156-1 | Sep 14, 2026 |
| MozillaFirefox · sles 15.7 | 153.2.0-150400.157.5.1 | SUSE-SU-2026:4156-1 | Sep 14, 2026 |
| MozillaFirefox · sles 16.0 | 153.2.0-160000.1.1 | SUSE-SU-2026:23784-1 | Sep 15, 2026 |
| MozillaFirefox-branding-SLE · sles 15.6 | 153-150400.14.3.1 | SUSE-SU-2026:4156-1 | Sep 14, 2026 |
| MozillaFirefox-branding-SLE · sles 15.7 | 153-150400.14.3.1 | SUSE-SU-2026:4156-1 | Sep 14, 2026 |
| MozillaThunderbird · sles 15.7 | 153.2.0-150400.13.3.1 | SUSE-SU-2026:4268-1 | Sep 18, 2026 |
| firefox · RHEL 10 | 140.15.0-1.el10_0 | RHSA-2026:77610 | Sep 27, 2026 |
| firefox · RHEL 8 | 0:140.15.0-1.el8_10 | RHSA-2026:68549 | Sep 27, 2026 |
| firefox · RHEL 9 | 0:140.15.0-1.el9_8 | RHSA-2026:67133 | Sep 27, 2026 |
| firefox · almalinux 10 | 140.15.0-1.el10_2 | ALSA-2026:67129 | Sep 14, 2026 |
| firefox · almalinux 8 | 140.15.0-1.el8_10.alma.1 | ALSA-2026:68549 | Sep 17, 2026 |
| firefox · almalinux 9 | 140.15.0-1.el9_8.alma.1 | ALSA-2026:67133 | Sep 14, 2026 |
| firefox · ol 10 | 0:140.15.0-1.0.1.el10_2 | ELSA-2026-67129-0 | Sep 14, 2026 |
| firefox · ol 8 | 0:140.15.0-1.0.1.el8_10 | ELSA-2026-68549 | Sep 17, 2026 |
| firefox · ol 9 | 0:140.15.0-1.0.1.el9_8 | ELSA-2026-67133-0 | Sep 14, 2026 |
| firefox · rocky 10 | 0:140.15.0-1.el10_2 | RLSA-2026:67129 | Sep 27, 2026 |
| firefox · rocky 8 | 0:140.15.0-1.el8_10 | RLSA-2026:68549 | Sep 27, 2026 |
| firefox · rocky 9 | 0:140.15.0-1.el9_8 | RLSA-2026:67133 | Sep 27, 2026 |
| firefox-esr · Debian 12.15 (bookworm) | 140.15.0esr-1~deb12u1 | DEBIAN-CVE-2026-75874 | Sep 4, 2026 |
| firefox-esr · Debian 13.5 (trixie) | 140.15.0esr-1~deb13u1 | DEBIAN-CVE-2026-75874 | Sep 4, 2026 |
| firefox-esr · Debian 14 | 140.15.0esr-1 | DEBIAN-CVE-2026-75874 | Sep 4, 2026 |
| firefox-x11 · RHEL 9 | 0:140.15.0-1.el9_8 | RHSA-2026:67133 | Sep 27, 2026 |
| firefox-x11 · almalinux 9 | 140.15.0-1.el9_8.alma.1 | ALSA-2026:67133 | Sep 14, 2026 |
| firefox-x11 · ol 9 | 0:140.15.0-1.0.1.el9_8 | ELSA-2026-67133-0 | Sep 14, 2026 |
| mozilla-nspr · sles 15.6 | 4.39-150400.12.3.1 | SUSE-SU-2026:4156-1 | Sep 14, 2026 |
| mozilla-nspr · sles 15.7 | 4.39-150400.12.3.1 | SUSE-SU-2026:4156-1 | Sep 14, 2026 |
| mozilla-nss · sles 15.6 | 3.125-150400.3.74.1 | SUSE-SU-2026:4156-1 | Sep 14, 2026 |
| mozilla-nss · sles 15.7 | 3.125-150400.3.74.1 | SUSE-SU-2026:4156-1 | Sep 14, 2026 |
| thunderbird · Debian 12.15 (bookworm) | 1:140.15.0esr-1~deb12u1 | DEBIAN-CVE-2026-75874 | Sep 4, 2026 |
| thunderbird · Debian 13.5 (trixie) | 1:140.15.0esr-1~deb13u1 | DEBIAN-CVE-2026-75874 | Sep 4, 2026 |
| thunderbird · Debian 14 | 1:153.2.0esr-1 | DEBIAN-CVE-2026-75874 | Sep 4, 2026 |
| thunderbird · RHEL 10 | 140.15.0-1.el10_0 | RHSA-2026:77631 | Sep 30, 2026 |
| thunderbird · RHEL 8 | 0:140.16.0-1.el8_10 | RHSA-2026:73971 | Oct 1, 2026 |
| thunderbird · RHEL 9 | 0:140.16.0-1.el9_8 | RHSA-2026:70642 | Sep 24, 2026 |
| thunderbird · almalinux 10 | 140.16.0-1.el10_2.alma.1 | ALSA-2026:73130 | Sep 29, 2026 |
| thunderbird · almalinux 8 | 140.16.0-1.el8_10.alma.1 | ALSA-2026:73971 | Sep 30, 2026 |
| thunderbird · almalinux 9 | 140.16.0-1.el9_8.alma.1 | ALSA-2026:70642 | Sep 23, 2026 |
| thunderbird · ol 10 | 0:140.16.0-1.0.1.el10_2 | ELSA-2026-73130 | Sep 29, 2026 |
| thunderbird · ol 8 | 0:140.16.0-1.0.1.el8_10 | ELSA-2026-73971 | Oct 1, 2026 |
| thunderbird · ol 9 | 0:140.16.0-1.0.1.el9_8 | ELSA-2026-70642 | Sep 24, 2026 |
| thunderbird · rocky 10 | 0:140.16.0-1.el10_2 | RLSA-2026:73130 | Sep 30, 2026 |
| thunderbird · rocky 8 | 0:140.16.0-1.el8_10 | RLSA-2026:73971 | Oct 1, 2026 |
| thunderbird · rocky 9 | 0:140.16.0-1.el9_8 | RLSA-2026:70642 | Sep 25, 2026 |
| No fix yet | |||
| Firefox Developer Edition (ach) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (af) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (an) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (ar) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (ast) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (az) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (be) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (bg) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (bn) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (br) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (bs) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (ca) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (ca-valencia) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (cak) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (cs) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (cy) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (da) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (de) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (dsb) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (el) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (en-CA) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (en-GB) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (eo) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (es-AR) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (es-CL) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (es-ES) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (es-MX) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (et) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (eu) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (fa) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (ff) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (fi) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (fr) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (fur) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (fy-NL) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (ga-IE) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (gd) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (gl) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (gn) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (gu-IN) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (he) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (hi-IN) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (hr) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (hsb) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (hu) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (hy-AM) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (ia) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (id) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (is) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (it) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (ja) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (ka) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (kab) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (kk) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (km) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (kn) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (ko) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (lij) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (lt) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (lv) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (mk) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (mr) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (ms) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (my) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (nb-NO) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (ne-NP) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (nl) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (nn-NO) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (oc) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (pa-IN) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (pl) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (pt-BR) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (pt-PT) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (rm) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (ro) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (ru) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (sc) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (sco) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (si) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (sk) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (sl) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (son) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (sq) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (sr) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (sv-SE) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (szl) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (ta) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (te) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (tg) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (th) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (tl) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (tr) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (trs) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (uk) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (ur) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (uz) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (vi) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (xh) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (zh-CN) (Windows apps) | No fix yet | no-fix | n/a |
| Firefox Developer Edition (zh-TW) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ach) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (af) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (an) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ar) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ast) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (az) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (be) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (bg) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (bn) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (br) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (bs) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ca) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ca-valencia) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (cak) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (cs) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (cy) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (da) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (de) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (dsb) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (el) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (en-CA) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (en-GB) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (en-US) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (eo) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (es-AR) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (es-CL) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (es-ES) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (es-MX) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (et) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (eu) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (fa) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ff) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (fi) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (fr) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (fur) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (fy-NL) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ga-IE) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (gd) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (gl) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (gn) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (gu-IN) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (he) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (hi-IN) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (hr) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (hsb) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (hu) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (hy-AM) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ia) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (id) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (is) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (it) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ja) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ka) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (kab) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (kk) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (km) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (kn) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ko) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (lij) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (lt) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (lv) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (mk) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (mr) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ms) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (my) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (nb-NO) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ne-NP) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (nl) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (nn-NO) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (oc) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (pa-IN) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (pl) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (pt-BR) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (pt-PT) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (rm) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ro) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ru) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (sat) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (sc) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (sco) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (si) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (sk) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (skr) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (sl) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (son) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (sq) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (sr) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (sv-SE) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (szl) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ta) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (te) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (tg) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (th) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (tl) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (tr) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (trs) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (uk) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (ur) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (uz) (Windows apps) | No fix yet | no-fix | n/a |
| Mozilla Firefox ESR (vi) (Windows apps) | No fix yet | no-fix | n/a |
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Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.