CVE-2026-57963
Chat UI manipulation by injection
CVE-2026-57963 is fixed in 134 products on 3 platforms, first by Mozilla Thunderbird 152.0.1, released June 30, 2026. It is not reported as exploited. Patch Radar priority: Routine.
RoutineFixed on 3 platforms
CVSS
6.5
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0031
23rd percentile
An attacker who can send HTML chat messages (via Matrix or XMPP) can inject arbitrary styled content, phishing links, and CSS that manipulates the chat UI. This vulnerability was fixed in Thunderbird 152.0.1 and Thunderbird 140.12.1.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Thunderbird (af) | 152.0.1 | Mozilla Thunderbird (af) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (ar) | 152.0.1 | Mozilla Thunderbird (ar) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (ast) | 152.0.1 | Mozilla Thunderbird (ast) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (be) | 152.0.1 | Mozilla Thunderbird (be) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (bg) | 152.0.1 | Mozilla Thunderbird (bg) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (br) | 152.0.1 | Mozilla Thunderbird (br) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (ca) | 152.0.1 | Mozilla Thunderbird (ca) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (cak) | 152.0.1 | Mozilla Thunderbird (cak) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (cs) | 152.0.1 | Mozilla Thunderbird (cs) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (cy) | 152.0.1 | Mozilla Thunderbird (cy) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (da) | 152.0.1 | Mozilla Thunderbird (da) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (de) | 152.0.1 | Mozilla Thunderbird (de) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (dsb) | 152.0.1 | Mozilla Thunderbird (dsb) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (el) | 152.0.1 | Mozilla Thunderbird (el) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (en-CA) | 152.0.1 | Mozilla Thunderbird (en-CA) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (en-GB) | 152.0.1 | Mozilla Thunderbird (en-GB) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (en-US) | 152.0.1 | Mozilla Thunderbird (en-US) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (es-AR) | 152.0.1 | Mozilla Thunderbird (es-AR) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (es-ES) | 152.0.1 | Mozilla Thunderbird (es-ES) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (es-MX) | 152.0.1 | Mozilla Thunderbird (es-MX) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (et) | 152.0.1 | Mozilla Thunderbird (et) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (eu) | 152.0.1 | Mozilla Thunderbird (eu) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (fi) | 152.0.1 | Mozilla Thunderbird (fi) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (fr) | 152.0.1 | Mozilla Thunderbird (fr) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (fy-NL) | 152.0.1 | Mozilla Thunderbird (fy-NL) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (ga-IE) | 152.0.1 | Mozilla Thunderbird (ga-IE) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (gd) | 152.0.1 | Mozilla Thunderbird (gd) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (gl) | 152.0.1 | Mozilla Thunderbird (gl) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (he) | 152.0.1 | Mozilla Thunderbird (he) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (hr) | 152.0.1 | Mozilla Thunderbird (hr) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (hsb) | 152.0.1 | Mozilla Thunderbird (hsb) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (hu) | 152.0.1 | Mozilla Thunderbird (hu) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (hy-AM) | 152.0.1 | Mozilla Thunderbird (hy-AM) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (id) | 152.0.1 | Mozilla Thunderbird (id) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (is) | 152.0.1 | Mozilla Thunderbird (is) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (it) | 152.0.1 | Mozilla Thunderbird (it) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (ja) | 152.0.1 | Mozilla Thunderbird (ja) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (ka) | 152.0.1 | Mozilla Thunderbird (ka) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (kab) | 152.0.1 | Mozilla Thunderbird (kab) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (kk) | 152.0.1 | Mozilla Thunderbird (kk) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (ko) | 152.0.1 | Mozilla Thunderbird (ko) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (lt) | 152.0.1 | Mozilla Thunderbird (lt) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (lv) | 152.0.1 | Mozilla Thunderbird (lv) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (ms) | 152.0.1 | Mozilla Thunderbird (ms) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (nb-NO) | 152.0.1 | Mozilla Thunderbird (nb-NO) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (nl) | 152.0.1 | Mozilla Thunderbird (nl) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (nn-NO) | 152.0.1 | Mozilla Thunderbird (nn-NO) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (pa-IN) | 152.0.1 | Mozilla Thunderbird (pa-IN) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (pl) | 152.0.1 | Mozilla Thunderbird (pl) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (pt-BR) | 152.0.1 | Mozilla Thunderbird (pt-BR) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (pt-PT) | 152.0.1 | Mozilla Thunderbird (pt-PT) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (rm) | 152.0.1 | Mozilla Thunderbird (rm) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (ro) | 152.0.1 | Mozilla Thunderbird (ro) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (ru) | 152.0.1 | Mozilla Thunderbird (ru) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (sk) | 152.0.1 | Mozilla Thunderbird (sk) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (sl) | 152.0.1 | Mozilla Thunderbird (sl) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (sq) | 152.0.1 | Mozilla Thunderbird (sq) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (sr) | 152.0.1 | Mozilla Thunderbird (sr) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (sv-SE) | 152.0.1 | Mozilla Thunderbird (sv-SE) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (th) | 152.0.1 | Mozilla Thunderbird (th) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (tr) | 152.0.1 | Mozilla Thunderbird (tr) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (uk) | 152.0.1 | Mozilla Thunderbird (uk) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (uz) | 152.0.1 | Mozilla Thunderbird (uz) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (vi) | 152.0.1 | Mozilla Thunderbird (vi) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (zh-CN) | 152.0.1 | Mozilla Thunderbird (zh-CN) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird (zh-TW) | 152.0.1 | Mozilla Thunderbird (zh-TW) 152.0.1 | Jul 1, 2026 |
| Mozilla Thunderbird ESR (af) | 153.0.1 | Mozilla Thunderbird ESR (af) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ar) | 153.0.1 | Mozilla Thunderbird ESR (ar) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ast) | 153.0.1 | Mozilla Thunderbird ESR (ast) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (be) | 153.0.1 | Mozilla Thunderbird ESR (be) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (bg) | 153.0.1 | Mozilla Thunderbird ESR (bg) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (br) | 153.0.1 | Mozilla Thunderbird ESR (br) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ca) | 153.0.1 | Mozilla Thunderbird ESR (ca) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (cak) | 153.0.1 | Mozilla Thunderbird ESR (cak) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (cs) | 153.0.1 | Mozilla Thunderbird ESR (cs) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (cy) | 153.0.1 | Mozilla Thunderbird ESR (cy) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (da) | 153.0.1 | Mozilla Thunderbird ESR (da) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (de) | 153.0.1 | Mozilla Thunderbird ESR (de) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (dsb) | 153.0.1 | Mozilla Thunderbird ESR (dsb) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (el) | 153.0.1 | Mozilla Thunderbird ESR (el) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (en-CA) | 153.0.1 | Mozilla Thunderbird ESR (en-CA) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (en-GB) | 153.0.1 | Mozilla Thunderbird ESR (en-GB) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (en-US) | 153.0.1 | Mozilla Thunderbird ESR (en-US) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (es-AR) | 153.0.1 | Mozilla Thunderbird ESR (es-AR) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (es-ES) | 153.0.1 | Mozilla Thunderbird ESR (es-ES) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (es-MX) | 153.0.1 | Mozilla Thunderbird ESR (es-MX) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (et) | 153.0.1 | Mozilla Thunderbird ESR (et) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (eu) | 153.0.1 | Mozilla Thunderbird ESR (eu) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (fi) | 153.0.1 | Mozilla Thunderbird ESR (fi) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (fr) | 153.0.1 | Mozilla Thunderbird ESR (fr) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (fy-NL) | 153.0.1 | Mozilla Thunderbird ESR (fy-NL) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ga-IE) | 153.0.1 | Mozilla Thunderbird ESR (ga-IE) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (gd) | 153.0.1 | Mozilla Thunderbird ESR (gd) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (gl) | 153.0.1 | Mozilla Thunderbird ESR (gl) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (he) | 153.0.1 | Mozilla Thunderbird ESR (he) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (hr) | 153.0.1 | Mozilla Thunderbird ESR (hr) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (hsb) | 153.0.1 | Mozilla Thunderbird ESR (hsb) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (hu) | 153.0.1 | Mozilla Thunderbird ESR (hu) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (hy-AM) | 153.0.1 | Mozilla Thunderbird ESR (hy-AM) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (id) | 153.0.1 | Mozilla Thunderbird ESR (id) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (is) | 153.0.1 | Mozilla Thunderbird ESR (is) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (it) | 153.0.1 | Mozilla Thunderbird ESR (it) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ja) | 153.0.1 | Mozilla Thunderbird ESR (ja) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ka) | 153.0.1 | Mozilla Thunderbird ESR (ka) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (kab) | 153.0.1 | Mozilla Thunderbird ESR (kab) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (kk) | 153.0.1 | Mozilla Thunderbird ESR (kk) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ko) | 153.0.1 | Mozilla Thunderbird ESR (ko) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (lt) | 153.0.1 | Mozilla Thunderbird ESR (lt) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (lv) | 153.0.1 | Mozilla Thunderbird ESR (lv) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ms) | 153.0.1 | Mozilla Thunderbird ESR (ms) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (nb-NO) | 153.0.1 | Mozilla Thunderbird ESR (nb-NO) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (nl) | 153.0.1 | Mozilla Thunderbird ESR (nl) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (nn-NO) | 153.0.1 | Mozilla Thunderbird ESR (nn-NO) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (pa-IN) | 153.0.1 | Mozilla Thunderbird ESR (pa-IN) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (pl) | 153.0.1 | Mozilla Thunderbird ESR (pl) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (pt-BR) | 153.0.1 | Mozilla Thunderbird ESR (pt-BR) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (pt-PT) | 153.0.1 | Mozilla Thunderbird ESR (pt-PT) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (rm) | 153.0.1 | Mozilla Thunderbird ESR (rm) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ro) | 153.0.1 | Mozilla Thunderbird ESR (ro) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ru) | 153.0.1 | Mozilla Thunderbird ESR (ru) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (sk) | 153.0.1 | Mozilla Thunderbird ESR (sk) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (sl) | 153.0.1 | Mozilla Thunderbird ESR (sl) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (sq) | 153.0.1 | Mozilla Thunderbird ESR (sq) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (sr) | 153.0.1 | Mozilla Thunderbird ESR (sr) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (sv-SE) | 153.0.1 | Mozilla Thunderbird ESR (sv-SE) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (th) | 153.0.1 | Mozilla Thunderbird ESR (th) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (tr) | 153.0.1 | Mozilla Thunderbird ESR (tr) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (uk) | 153.0.1 | Mozilla Thunderbird ESR (uk) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (uz) | 153.0.1 | Mozilla Thunderbird ESR (uz) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (vi) | 153.0.1 | Mozilla Thunderbird ESR (vi) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (zh-CN) | 153.0.1 | Mozilla Thunderbird ESR (zh-CN) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (zh-TW) | 153.0.1 | Mozilla Thunderbird ESR (zh-TW) 153.0.1 | Jul 23, 2026 |
| macOS | |||
| Mozilla Thunderbird | 152.0.1 | Mozilla Thunderbird 152.0.1 | Jun 30, 2026 |
| Linux | |||
| thunderbird · Debian 12.15 (bookworm) | 1:140.13.0esr-2~deb12u1 | DEBIAN-CVE-2026-57963 | Jul 1, 2026 |
| thunderbird · Debian 13.5 (trixie) | 1:140.13.0esr-2~deb13u1 | DEBIAN-CVE-2026-57963 | Jul 1, 2026 |
| thunderbird · Debian 14 | 1:140.13.0esr-1 | DEBIAN-CVE-2026-57963 | Jul 1, 2026 |
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