CVE-2026-8401
Sandbox escape in the Profile Backup component
CVE-2026-8401 is fixed in 310 products on 3 platforms, first by Mozilla Firefox (ach) 150.0.3, released May 12, 2026. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 3 platforms
CVSS
9.8
important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0031
24th percentile
Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Firefox Developer Edition (ach) | 151.0 | Firefox Developer Edition (ach) 151.0 | May 13, 2026 |
| Firefox Developer Edition (af) | 151.0 | Firefox Developer Edition (af) 151.0 | May 13, 2026 |
| Firefox Developer Edition (an) | 151.0 | Firefox Developer Edition (an) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ar) | 151.0 | Firefox Developer Edition (ar) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ast) | 151.0 | Firefox Developer Edition (ast) 151.0 | May 13, 2026 |
| Firefox Developer Edition (az) | 151.0 | Firefox Developer Edition (az) 151.0 | May 13, 2026 |
| Firefox Developer Edition (be) | 151.0 | Firefox Developer Edition (be) 151.0 | May 13, 2026 |
| Firefox Developer Edition (bg) | 151.0 | Firefox Developer Edition (bg) 151.0 | May 13, 2026 |
| Firefox Developer Edition (bn) | 151.0 | Firefox Developer Edition (bn) 151.0 | May 13, 2026 |
| Firefox Developer Edition (br) | 151.0 | Firefox Developer Edition (br) 151.0 | May 13, 2026 |
| Firefox Developer Edition (bs) | 151.0 | Firefox Developer Edition (bs) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ca) | 151.0 | Firefox Developer Edition (ca) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ca-valencia) | 151.0 | Firefox Developer Edition (ca-valencia) 151.0 | May 13, 2026 |
| Firefox Developer Edition (cak) | 151.0 | Firefox Developer Edition (cak) 151.0 | May 13, 2026 |
| Firefox Developer Edition (cs) | 151.0 | Firefox Developer Edition (cs) 151.0 | May 13, 2026 |
| Firefox Developer Edition (cy) | 151.0 | Firefox Developer Edition (cy) 151.0 | May 13, 2026 |
| Firefox Developer Edition (da) | 151.0 | Firefox Developer Edition (da) 151.0 | May 13, 2026 |
| Firefox Developer Edition (de) | 151.0 | Firefox Developer Edition (de) 151.0 | May 13, 2026 |
| Firefox Developer Edition (dsb) | 151.0 | Firefox Developer Edition (dsb) 151.0 | May 13, 2026 |
| Firefox Developer Edition (el) | 151.0 | Firefox Developer Edition (el) 151.0 | May 13, 2026 |
| Firefox Developer Edition (en-CA) | 151.0 | Firefox Developer Edition (en-CA) 151.0 | May 13, 2026 |
| Firefox Developer Edition (en-GB) | 151.0 | Firefox Developer Edition (en-GB) 151.0 | May 13, 2026 |
| Firefox Developer Edition (en-US) | 151.0 | Firefox Developer Edition (en-US) 151.0 | May 13, 2026 |
| Firefox Developer Edition (eo) | 151.0 | Firefox Developer Edition (eo) 151.0 | May 13, 2026 |
| Firefox Developer Edition (es-AR) | 151.0 | Firefox Developer Edition (es-AR) 151.0 | May 13, 2026 |
| Firefox Developer Edition (es-CL) | 151.0 | Firefox Developer Edition (es-CL) 151.0 | May 13, 2026 |
| Firefox Developer Edition (es-ES) | 151.0 | Firefox Developer Edition (es-ES) 151.0 | May 13, 2026 |
| Firefox Developer Edition (es-MX) | 151.0 | Firefox Developer Edition (es-MX) 151.0 | May 13, 2026 |
| Firefox Developer Edition (et) | 151.0 | Firefox Developer Edition (et) 151.0 | May 13, 2026 |
| Firefox Developer Edition (eu) | 151.0 | Firefox Developer Edition (eu) 151.0 | May 13, 2026 |
| Firefox Developer Edition (fa) | 151.0 | Firefox Developer Edition (fa) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ff) | 151.0 | Firefox Developer Edition (ff) 151.0 | May 13, 2026 |
| Firefox Developer Edition (fi) | 151.0 | Firefox Developer Edition (fi) 151.0 | May 13, 2026 |
| Firefox Developer Edition (fr) | 151.0 | Firefox Developer Edition (fr) 151.0 | May 13, 2026 |
| Firefox Developer Edition (fur) | 151.0 | Firefox Developer Edition (fur) 151.0 | May 13, 2026 |
| Firefox Developer Edition (fy-NL) | 151.0 | Firefox Developer Edition (fy-NL) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ga-IE) | 151.0 | Firefox Developer Edition (ga-IE) 151.0 | May 13, 2026 |
| Firefox Developer Edition (gd) | 151.0 | Firefox Developer Edition (gd) 151.0 | May 13, 2026 |
| Firefox Developer Edition (gl) | 151.0 | Firefox Developer Edition (gl) 151.0 | May 13, 2026 |
| Firefox Developer Edition (gn) | 151.0 | Firefox Developer Edition (gn) 151.0 | May 13, 2026 |
| Firefox Developer Edition (gu-IN) | 151.0 | Firefox Developer Edition (gu-IN) 151.0 | May 13, 2026 |
| Firefox Developer Edition (he) | 151.0 | Firefox Developer Edition (he) 151.0 | May 13, 2026 |
| Firefox Developer Edition (hi-IN) | 151.0 | Firefox Developer Edition (hi-IN) 151.0 | May 13, 2026 |
| Firefox Developer Edition (hr) | 151.0 | Firefox Developer Edition (hr) 151.0 | May 13, 2026 |
| Firefox Developer Edition (hsb) | 151.0 | Firefox Developer Edition (hsb) 151.0 | May 13, 2026 |
| Firefox Developer Edition (hu) | 151.0 | Firefox Developer Edition (hu) 151.0 | May 13, 2026 |
| Firefox Developer Edition (hy-AM) | 151.0 | Firefox Developer Edition (hy-AM) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ia) | 151.0 | Firefox Developer Edition (ia) 151.0 | May 13, 2026 |
| Firefox Developer Edition (id) | 151.0 | Firefox Developer Edition (id) 151.0 | May 13, 2026 |
| Firefox Developer Edition (is) | 151.0 | Firefox Developer Edition (is) 151.0 | May 13, 2026 |
| Firefox Developer Edition (it) | 151.0 | Firefox Developer Edition (it) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ja) | 151.0 | Firefox Developer Edition (ja) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ka) | 151.0 | Firefox Developer Edition (ka) 151.0 | May 13, 2026 |
| Firefox Developer Edition (kab) | 151.0 | Firefox Developer Edition (kab) 151.0 | May 13, 2026 |
| Firefox Developer Edition (kk) | 151.0 | Firefox Developer Edition (kk) 151.0 | May 13, 2026 |
| Firefox Developer Edition (km) | 151.0 | Firefox Developer Edition (km) 151.0 | May 13, 2026 |
| Firefox Developer Edition (kn) | 151.0 | Firefox Developer Edition (kn) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ko) | 151.0 | Firefox Developer Edition (ko) 151.0 | May 13, 2026 |
| Firefox Developer Edition (lij) | 151.0 | Firefox Developer Edition (lij) 151.0 | May 13, 2026 |
| Firefox Developer Edition (lt) | 151.0 | Firefox Developer Edition (lt) 151.0 | May 13, 2026 |
| Firefox Developer Edition (lv) | 151.0 | Firefox Developer Edition (lv) 151.0 | May 13, 2026 |
| Firefox Developer Edition (mk) | 151.0 | Firefox Developer Edition (mk) 151.0 | May 13, 2026 |
| Firefox Developer Edition (mr) | 151.0 | Firefox Developer Edition (mr) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ms) | 151.0 | Firefox Developer Edition (ms) 151.0 | May 13, 2026 |
| Firefox Developer Edition (my) | 151.0 | Firefox Developer Edition (my) 151.0 | May 13, 2026 |
| Firefox Developer Edition (nb-NO) | 151.0 | Firefox Developer Edition (nb-NO) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ne-NP) | 151.0 | Firefox Developer Edition (ne-NP) 151.0 | May 13, 2026 |
| Firefox Developer Edition (nl) | 151.0 | Firefox Developer Edition (nl) 151.0 | May 13, 2026 |
| Firefox Developer Edition (nn-NO) | 151.0 | Firefox Developer Edition (nn-NO) 151.0 | May 13, 2026 |
| Firefox Developer Edition (oc) | 151.0 | Firefox Developer Edition (oc) 151.0 | May 13, 2026 |
| Firefox Developer Edition (pa-IN) | 151.0 | Firefox Developer Edition (pa-IN) 151.0 | May 13, 2026 |
| Firefox Developer Edition (pl) | 151.0 | Firefox Developer Edition (pl) 151.0 | May 13, 2026 |
| Firefox Developer Edition (pt-BR) | 151.0 | Firefox Developer Edition (pt-BR) 151.0 | May 13, 2026 |
| Firefox Developer Edition (pt-PT) | 151.0 | Firefox Developer Edition (pt-PT) 151.0 | May 13, 2026 |
| Firefox Developer Edition (rm) | 151.0 | Firefox Developer Edition (rm) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ro) | 151.0 | Firefox Developer Edition (ro) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ru) | 151.0 | Firefox Developer Edition (ru) 151.0 | May 13, 2026 |
| Firefox Developer Edition (sc) | 151.0 | Firefox Developer Edition (sc) 151.0 | May 13, 2026 |
| Firefox Developer Edition (sco) | 151.0 | Firefox Developer Edition (sco) 151.0 | May 13, 2026 |
| Firefox Developer Edition (si) | 151.0 | Firefox Developer Edition (si) 151.0 | May 13, 2026 |
| Firefox Developer Edition (sk) | 151.0 | Firefox Developer Edition (sk) 151.0 | May 13, 2026 |
| Firefox Developer Edition (sl) | 151.0 | Firefox Developer Edition (sl) 151.0 | May 13, 2026 |
| Firefox Developer Edition (son) | 151.0 | Firefox Developer Edition (son) 151.0 | May 13, 2026 |
| Firefox Developer Edition (sq) | 151.0 | Firefox Developer Edition (sq) 151.0 | May 13, 2026 |
| Firefox Developer Edition (sr) | 151.0 | Firefox Developer Edition (sr) 151.0 | May 13, 2026 |
| Firefox Developer Edition (sv-SE) | 151.0 | Firefox Developer Edition (sv-SE) 151.0 | May 13, 2026 |
| Firefox Developer Edition (szl) | 151.0 | Firefox Developer Edition (szl) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ta) | 151.0 | Firefox Developer Edition (ta) 151.0 | May 13, 2026 |
| Firefox Developer Edition (te) | 151.0 | Firefox Developer Edition (te) 151.0 | May 13, 2026 |
| Firefox Developer Edition (tg) | 151.0 | Firefox Developer Edition (tg) 151.0 | May 13, 2026 |
| Firefox Developer Edition (th) | 151.0 | Firefox Developer Edition (th) 151.0 | May 13, 2026 |
| Firefox Developer Edition (tl) | 151.0 | Firefox Developer Edition (tl) 151.0 | May 13, 2026 |
| Firefox Developer Edition (tr) | 151.0 | Firefox Developer Edition (tr) 151.0 | May 13, 2026 |
| Firefox Developer Edition (trs) | 151.0 | Firefox Developer Edition (trs) 151.0 | May 13, 2026 |
| Firefox Developer Edition (uk) | 151.0 | Firefox Developer Edition (uk) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ur) | 151.0 | Firefox Developer Edition (ur) 151.0 | May 13, 2026 |
| Firefox Developer Edition (uz) | 151.0 | Firefox Developer Edition (uz) 151.0 | May 13, 2026 |
| Firefox Developer Edition (vi) | 151.0 | Firefox Developer Edition (vi) 151.0 | May 13, 2026 |
| Firefox Developer Edition (xh) | 151.0 | Firefox Developer Edition (xh) 151.0 | May 13, 2026 |
| Firefox Developer Edition (zh-CN) | 151.0 | Firefox Developer Edition (zh-CN) 151.0 | May 13, 2026 |
| Firefox Developer Edition (zh-TW) | 151.0 | Firefox Developer Edition (zh-TW) 151.0 | May 13, 2026 |
| Mozilla Firefox (ach) | 150.0.3 | Mozilla Firefox (ach) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (af) | 150.0.3 | Mozilla Firefox (af) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (an) | 150.0.3 | Mozilla Firefox (an) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (ar) | 150.0.3 | Mozilla Firefox (ar) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (ast) | 150.0.3 | Mozilla Firefox (ast) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (az) | 150.0.3 | Mozilla Firefox (az) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (be) | 150.0.3 | Mozilla Firefox (be) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (bg) | 150.0.3 | Mozilla Firefox (bg) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (bn) | 150.0.3 | Mozilla Firefox (bn) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (br) | 150.0.3 | Mozilla Firefox (br) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (bs) | 150.0.3 | Mozilla Firefox (bs) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (ca) | 150.0.3 | Mozilla Firefox (ca) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (ca-valencia) | 150.0.3 | Mozilla Firefox (ca-valencia) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (cak) | 150.0.3 | Mozilla Firefox (cak) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (cs) | 150.0.3 | Mozilla Firefox (cs) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (cy) | 150.0.3 | Mozilla Firefox (cy) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (da) | 150.0.3 | Mozilla Firefox (da) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (de) | 150.0.3 | Mozilla Firefox (de) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (dsb) | 150.0.3 | Mozilla Firefox (dsb) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (el) | 150.0.3 | Mozilla Firefox (el) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (en-CA) | 150.0.3 | Mozilla Firefox (en-CA) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (en-GB) | 150.0.3 | Mozilla Firefox (en-GB) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (en-US) | 150.0.3 | Mozilla Firefox (en-US) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (eo) | 150.0.3 | Mozilla Firefox (eo) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (es-AR) | 150.0.3 | Mozilla Firefox (es-AR) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (es-CL) | 150.0.3 | Mozilla Firefox (es-CL) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (es-ES) | 150.0.3 | Mozilla Firefox (es-ES) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (es-MX) | 150.0.3 | Mozilla Firefox (es-MX) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (et) | 150.0.3 | Mozilla Firefox (et) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (eu) | 150.0.3 | Mozilla Firefox (eu) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (fa) | 150.0.3 | Mozilla Firefox (fa) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (ff) | 150.0.3 | Mozilla Firefox (ff) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (fi) | 150.0.3 | Mozilla Firefox (fi) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (fr) | 150.0.3 | Mozilla Firefox (fr) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (fur) | 150.0.3 | Mozilla Firefox (fur) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (fy-NL) | 150.0.3 | Mozilla Firefox (fy-NL) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (ga-IE) | 150.0.3 | Mozilla Firefox (ga-IE) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (gd) | 150.0.3 | Mozilla Firefox (gd) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (gl) | 150.0.3 | Mozilla Firefox (gl) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (gn) | 150.0.3 | Mozilla Firefox (gn) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (gu-IN) | 150.0.3 | Mozilla Firefox (gu-IN) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (he) | 150.0.3 | Mozilla Firefox (he) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (hi-IN) | 150.0.3 | Mozilla Firefox (hi-IN) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (hr) | 150.0.3 | Mozilla Firefox (hr) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (hsb) | 150.0.3 | Mozilla Firefox (hsb) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (hu) | 150.0.3 | Mozilla Firefox (hu) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (hy-AM) | 150.0.3 | Mozilla Firefox (hy-AM) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (ia) | 150.0.3 | Mozilla Firefox (ia) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (id) | 150.0.3 | Mozilla Firefox (id) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (is) | 150.0.3 | Mozilla Firefox (is) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (it) | 150.0.3 | Mozilla Firefox (it) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (ja) | 150.0.3 | Mozilla Firefox (ja) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (ka) | 150.0.3 | Mozilla Firefox (ka) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (kab) | 150.0.3 | Mozilla Firefox (kab) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (kk) | 150.0.3 | Mozilla Firefox (kk) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (km) | 150.0.3 | Mozilla Firefox (km) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (kn) | 150.0.3 | Mozilla Firefox (kn) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (ko) | 150.0.3 | Mozilla Firefox (ko) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (lij) | 150.0.3 | Mozilla Firefox (lij) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (lt) | 150.0.3 | Mozilla Firefox (lt) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (lv) | 150.0.3 | Mozilla Firefox (lv) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (mk) | 150.0.3 | Mozilla Firefox (mk) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (mr) | 150.0.3 | Mozilla Firefox (mr) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (ms) | 150.0.3 | Mozilla Firefox (ms) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (my) | 150.0.3 | Mozilla Firefox (my) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (nb-NO) | 150.0.3 | Mozilla Firefox (nb-NO) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (ne-NP) | 150.0.3 | Mozilla Firefox (ne-NP) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (nl) | 150.0.3 | Mozilla Firefox (nl) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (nn-NO) | 150.0.3 | Mozilla Firefox (nn-NO) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (oc) | 150.0.3 | Mozilla Firefox (oc) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (pa-IN) | 150.0.3 | Mozilla Firefox (pa-IN) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (pl) | 150.0.3 | Mozilla Firefox (pl) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (pt-BR) | 150.0.3 | Mozilla Firefox (pt-BR) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (pt-PT) | 150.0.3 | Mozilla Firefox (pt-PT) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (rm) | 150.0.3 | Mozilla Firefox (rm) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (ro) | 150.0.3 | Mozilla Firefox (ro) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (ru) | 150.0.3 | Mozilla Firefox (ru) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (sc) | 150.0.3 | Mozilla Firefox (sc) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (sco) | 150.0.3 | Mozilla Firefox (sco) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (si) | 150.0.3 | Mozilla Firefox (si) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (sk) | 150.0.3 | Mozilla Firefox (sk) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (sl) | 150.0.3 | Mozilla Firefox (sl) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (son) | 150.0.3 | Mozilla Firefox (son) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (sq) | 150.0.3 | Mozilla Firefox (sq) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (sr) | 150.0.3 | Mozilla Firefox (sr) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (sv-SE) | 150.0.3 | Mozilla Firefox (sv-SE) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (szl) | 150.0.3 | Mozilla Firefox (szl) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (ta) | 150.0.3 | Mozilla Firefox (ta) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (te) | 150.0.3 | Mozilla Firefox (te) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (tg) | 150.0.3 | Mozilla Firefox (tg) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (th) | 150.0.3 | Mozilla Firefox (th) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (tl) | 150.0.3 | Mozilla Firefox (tl) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (tr) | 150.0.3 | Mozilla Firefox (tr) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (trs) | 150.0.3 | Mozilla Firefox (trs) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (uk) | 150.0.3 | Mozilla Firefox (uk) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (ur) | 150.0.3 | Mozilla Firefox (ur) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (uz) | 150.0.3 | Mozilla Firefox (uz) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (vi) | 150.0.3 | Mozilla Firefox (vi) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (xh) | 150.0.3 | Mozilla Firefox (xh) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (zh-CN) | 150.0.3 | Mozilla Firefox (zh-CN) 150.0.3 | May 12, 2026 |
| Mozilla Firefox (zh-TW) | 150.0.3 | Mozilla Firefox (zh-TW) 150.0.3 | May 12, 2026 |
| Mozilla Firefox ESR (ach) | 153.0.0 | Mozilla Firefox ESR (ach) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (af) | 153.0.0 | Mozilla Firefox ESR (af) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (an) | 153.0.0 | Mozilla Firefox ESR (an) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ar) | 153.0.0 | Mozilla Firefox ESR (ar) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ast) | 153.0.0 | Mozilla Firefox ESR (ast) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (az) | 153.0.0 | Mozilla Firefox ESR (az) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (be) | 153.0.0 | Mozilla Firefox ESR (be) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (bg) | 153.0.0 | Mozilla Firefox ESR (bg) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (bn) | 153.0.0 | Mozilla Firefox ESR (bn) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (br) | 153.0.0 | Mozilla Firefox ESR (br) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (bs) | 153.0.0 | Mozilla Firefox ESR (bs) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ca) | 153.0.0 | Mozilla Firefox ESR (ca) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ca-valencia) | 153.0.0 | Mozilla Firefox ESR (ca-valencia) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (cak) | 153.0.0 | Mozilla Firefox ESR (cak) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (cs) | 153.0.0 | Mozilla Firefox ESR (cs) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (cy) | 153.0.0 | Mozilla Firefox ESR (cy) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (da) | 153.0.0 | Mozilla Firefox ESR (da) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (de) | 153.0.0 | Mozilla Firefox ESR (de) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (dsb) | 153.0.0 | Mozilla Firefox ESR (dsb) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (el) | 153.0.0 | Mozilla Firefox ESR (el) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (en-CA) | 153.0.0 | Mozilla Firefox ESR (en-CA) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (en-GB) | 153.0.0 | Mozilla Firefox ESR (en-GB) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (en-US) | 153.0.0 | Mozilla Firefox ESR (en-US) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (eo) | 153.0.0 | Mozilla Firefox ESR (eo) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (es-AR) | 153.0.0 | Mozilla Firefox ESR (es-AR) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (es-CL) | 153.0.0 | Mozilla Firefox ESR (es-CL) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (es-ES) | 153.0.0 | Mozilla Firefox ESR (es-ES) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (es-MX) | 153.0.0 | Mozilla Firefox ESR (es-MX) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (et) | 153.0.0 | Mozilla Firefox ESR (et) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (eu) | 153.0.0 | Mozilla Firefox ESR (eu) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (fa) | 153.0.0 | Mozilla Firefox ESR (fa) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ff) | 153.0.0 | Mozilla Firefox ESR (ff) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (fi) | 153.0.0 | Mozilla Firefox ESR (fi) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (fr) | 153.0.0 | Mozilla Firefox ESR (fr) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (fur) | 153.0.0 | Mozilla Firefox ESR (fur) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (fy-NL) | 153.0.0 | Mozilla Firefox ESR (fy-NL) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ga-IE) | 153.0.0 | Mozilla Firefox ESR (ga-IE) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (gd) | 153.0.0 | Mozilla Firefox ESR (gd) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (gl) | 153.0.0 | Mozilla Firefox ESR (gl) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (gn) | 153.0.0 | Mozilla Firefox ESR (gn) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (gu-IN) | 153.0.0 | Mozilla Firefox ESR (gu-IN) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (he) | 153.0.0 | Mozilla Firefox ESR (he) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (hi-IN) | 153.0.0 | Mozilla Firefox ESR (hi-IN) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (hr) | 153.0.0 | Mozilla Firefox ESR (hr) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (hsb) | 153.0.0 | Mozilla Firefox ESR (hsb) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (hu) | 153.0.0 | Mozilla Firefox ESR (hu) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (hy-AM) | 153.0.0 | Mozilla Firefox ESR (hy-AM) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ia) | 153.0.0 | Mozilla Firefox ESR (ia) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (id) | 153.0.0 | Mozilla Firefox ESR (id) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (is) | 153.0.0 | Mozilla Firefox ESR (is) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (it) | 153.0.0 | Mozilla Firefox ESR (it) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ja) | 153.0.0 | Mozilla Firefox ESR (ja) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ka) | 153.0.0 | Mozilla Firefox ESR (ka) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (kab) | 153.0.0 | Mozilla Firefox ESR (kab) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (kk) | 153.0.0 | Mozilla Firefox ESR (kk) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (km) | 153.0.0 | Mozilla Firefox ESR (km) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (kn) | 153.0.0 | Mozilla Firefox ESR (kn) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ko) | 153.0.0 | Mozilla Firefox ESR (ko) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (lij) | 153.0.0 | Mozilla Firefox ESR (lij) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (lt) | 153.0.0 | Mozilla Firefox ESR (lt) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (lv) | 153.0.0 | Mozilla Firefox ESR (lv) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (mk) | 153.0.0 | Mozilla Firefox ESR (mk) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (mr) | 153.0.0 | Mozilla Firefox ESR (mr) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ms) | 153.0.0 | Mozilla Firefox ESR (ms) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (my) | 153.0.0 | Mozilla Firefox ESR (my) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (nb-NO) | 153.0.0 | Mozilla Firefox ESR (nb-NO) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ne-NP) | 153.0.0 | Mozilla Firefox ESR (ne-NP) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (nl) | 153.0.0 | Mozilla Firefox ESR (nl) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (nn-NO) | 153.0.0 | Mozilla Firefox ESR (nn-NO) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (oc) | 153.0.0 | Mozilla Firefox ESR (oc) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (pa-IN) | 153.0.0 | Mozilla Firefox ESR (pa-IN) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (pl) | 153.0.0 | Mozilla Firefox ESR (pl) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (pt-BR) | 153.0.0 | Mozilla Firefox ESR (pt-BR) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (pt-PT) | 153.0.0 | Mozilla Firefox ESR (pt-PT) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (rm) | 153.0.0 | Mozilla Firefox ESR (rm) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ro) | 153.0.0 | Mozilla Firefox ESR (ro) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ru) | 153.0.0 | Mozilla Firefox ESR (ru) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (sat) | 153.0.0 | Mozilla Firefox ESR (sat) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (sc) | 153.0.0 | Mozilla Firefox ESR (sc) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (sco) | 153.0.0 | Mozilla Firefox ESR (sco) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (si) | 153.0.0 | Mozilla Firefox ESR (si) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (sk) | 153.0.0 | Mozilla Firefox ESR (sk) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (sl) | 153.0.0 | Mozilla Firefox ESR (sl) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (son) | 153.0.0 | Mozilla Firefox ESR (son) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (sq) | 153.0.0 | Mozilla Firefox ESR (sq) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (sr) | 153.0.0 | Mozilla Firefox ESR (sr) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (sv-SE) | 153.0.0 | Mozilla Firefox ESR (sv-SE) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (szl) | 153.0.0 | Mozilla Firefox ESR (szl) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ta) | 153.0.0 | Mozilla Firefox ESR (ta) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (te) | 153.0.0 | Mozilla Firefox ESR (te) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (tg) | 153.0.0 | Mozilla Firefox ESR (tg) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (th) | 153.0.0 | Mozilla Firefox ESR (th) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (tl) | 153.0.0 | Mozilla Firefox ESR (tl) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (tr) | 153.0.0 | Mozilla Firefox ESR (tr) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (trs) | 153.0.0 | Mozilla Firefox ESR (trs) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (uk) | 153.0.0 | Mozilla Firefox ESR (uk) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ur) | 153.0.0 | Mozilla Firefox ESR (ur) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (uz) | 153.0.0 | Mozilla Firefox ESR (uz) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (vi) | 153.0.0 | Mozilla Firefox ESR (vi) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (xh) | 153.0.0 | Mozilla Firefox ESR (xh) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (zh-CN) | 153.0.0 | Mozilla Firefox ESR (zh-CN) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (zh-TW) | 153.0.0 | Mozilla Firefox ESR (zh-TW) 153.0.0 | Jul 20, 2026 |
| macOS | |||
| Mozilla Firefox | 151.0.2 | Mozilla Firefox 151.0.2 | May 25, 2026 |
| Linux | |||
| MozillaThunderbird · opensuse-leap 16.0 | 140.12.0-bp160.1.1 | OPENSUSE-SU-2026:21168-1 | Jun 29, 2026 |
| firefox · RHEL 10 | 140.11.0-1.el10_0 | RHSA-2026:27715 | May 19, 2026 |
| firefox · RHEL 8 | 0:140.11.0-1.el8_10 | RHSA-2026:21382 | May 27, 2026 |
| firefox · RHEL 9 | 0:140.11.0-1.el9_8 | RHSA-2026:21378 | Jun 24, 2026 |
| firefox · almalinux 10 | 140.11.0-1.el10_2 | ALSA-2026:21380 | May 27, 2026 |
| firefox · almalinux 8 | 140.11.0-1.el8_10.alma.1 | ALSA-2026:21382 | May 27, 2026 |
| firefox · almalinux 9 | 140.11.0-1.el9_8.alma.1 | ALSA-2026:21378 | May 27, 2026 |
| firefox · ol 10 | 0:140.12.0-1.0.1.el10_2 | ELSA-2026-21380 | Jul 20, 2026 |
| firefox · ol 8 | 0:140.11.0-1.0.1.el8_10 | ELSA-2026-21382 | May 28, 2026 |
| firefox · ol 9 | 0:140.12.0-1.0.1.el9_8 | ELSA-2026-21378 | Jun 29, 2026 |
| firefox · rocky 10 | 0:140.11.0-1.el10_2 | RLSA-2026:21380 | Jun 4, 2026 |
| firefox · rocky 8 | 0:140.11.0-1.el8_10 | RLSA-2026:21382 | May 29, 2026 |
| firefox · rocky 9 | 0:140.11.0-1.el9_8 | RLSA-2026:21378 | May 30, 2026 |
| firefox-esr · Debian 12.15 (bookworm) | 140.11.0esr-1~deb12u1 | DEBIAN-CVE-2026-8401 | May 27, 2026 |
| firefox-esr · Debian 13.5 (trixie) | 140.11.0esr-1~deb13u1 | DEBIAN-CVE-2026-8401 | May 27, 2026 |
| firefox-esr · Debian 14 | 140.11.0esr-1 | DEBIAN-CVE-2026-8401 | May 27, 2026 |
| firefox-x11 · RHEL 9 | 0:140.11.0-1.el9_8 | RHSA-2026:21378 | Jun 24, 2026 |
| firefox-x11 · almalinux 9 | 140.11.0-1.el9_8.alma.1 | ALSA-2026:21378 | May 27, 2026 |
| firefox-x11 · ol 9 | 0:140.12.0-1.0.1.el9_8 | ELSA-2026-21378 | Jun 29, 2026 |
| thunderbird · Debian 12.15 (bookworm) | 1:140.11.0esr-1~deb12u1 | DEBIAN-CVE-2026-8401 | May 27, 2026 |
| thunderbird · Debian 13.5 (trixie) | 1:140.11.0esr-1~deb13u1 | DEBIAN-CVE-2026-8401 | May 27, 2026 |
| thunderbird · Debian 14 | 1:140.11.0esr-1 | DEBIAN-CVE-2026-8401 | May 27, 2026 |
| thunderbird · RHEL 10 | 140.11.0-1.el10_0 | RHSA-2026:26539 | May 19, 2026 |
| thunderbird · RHEL 8 | 0:140.11.0-1.el8_10 | RHSA-2026:22643 | Jun 24, 2026 |
| thunderbird · RHEL 9 | 0:140.11.0-1.el9_8 | RHSA-2026:21381 | May 27, 2026 |
| thunderbird · almalinux 10 | 140.11.0-1.el10_2.alma.1 | ALSA-2026:22325 | Jun 1, 2026 |
| thunderbird · almalinux 8 | 140.11.0-1.el8_10.alma.1 | ALSA-2026:22643 | Jun 2, 2026 |
| thunderbird · almalinux 9 | 140.11.0-1.el9_8.alma.1 | ALSA-2026:21381 | May 27, 2026 |
| thunderbird · ol 10 | 0:140.12.0-1.0.1.el10_2 | ELSA-2026-22325 | Jul 17, 2026 |
| thunderbird · ol 8 | 0:140.11.0-1.0.1.el8_10 | ELSA-2026-22643 | Jun 3, 2026 |
| thunderbird · ol 9 | 0:140.11.0-1.0.1.el9_8 | ELSA-2026-21381 | Jun 23, 2026 |
| thunderbird · rocky 10 | 0:140.11.0-1.el10_2 | RLSA-2026:22325 | Jun 5, 2026 |
| thunderbird · rocky 8 | 0:140.11.0-1.el8_10 | RLSA-2026:22643 | Jun 6, 2026 |
| thunderbird · rocky 9 | 0:140.11.0-1.el9_8 | RLSA-2026:21381 | May 30, 2026 |
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