Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.
CVSS Details
- CVSS 3.1 Base Score: 7.3
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefox-x11Upgrade thunderbirdUpgrade firefox | Sep 29, 2025 | Sep 22, 2025 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade firefox | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefoxUpgrade firefox-debugsourceUpgrade firefox-debuginfo | Sep 30, 2025 | Sep 16, 2025 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Sep 22, 2025 | Sep 22, 2025 |
| Freebsd | — | Upgrade thunderbirdUpgrade firefoxUpgrade firefox-esr | Dec 10, 2025 | Nov 2, 2025 |
| Mfsa2025 73 | — | Upgrade to Mozilla Firefox version 143.0 | Sep 17, 2025 | Sep 16, 2025 |
| Mfsa2025 75 | — | Upgrade to Mozilla Firefox ESR version 140.3 | Sep 17, 2025 | Sep 16, 2025 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 140.3 | Sep 17, 2025 | Sep 16, 2025 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-x11 | Sep 22, 2025 | Sep 16, 2025 |
| Redhat_linux | — | Upgrade thunderbirdUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade firefoxUpgrade firefox-x11No solution existsUpgrade firefox-debugsource | Sep 19, 2025 | Sep 16, 2025 |
| Rocky_linux | — | Upgrade firefox-x11Upgrade thunderbird-debugsourceUpgrade firefoxUpgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade thunderbirdUpgrade firefox-debuginfo | Feb 5, 2026 | Oct 3, 2025 |
| Suse | — | Upgrade mozillafirefox-translations-commonUpgrade mozillathunderbird-translations-otherUpgrade mozillafirefoxUpgrade mozillathunderbirdUpgrade mozillathunderbird-translations-commonUpgrade mozillafirefox-develUpgrade mozillafirefox-branding-upstreamUpgrade MozillaThunderbird-openpgp-librnpUpgrade mozillafirefox-translations-other | Dec 5, 2025 | Sep 20, 2025 |
| Ubuntu | — | Upgrade thunderbird | Feb 4, 2026 | Feb 2, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub