CVE-2026-8949

Description

Integer overflow in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

CVSS Vector

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1355639
• https://www.mozilla.org/security/advisories/mfsa2026-46/
• https://www.mozilla.org/security/advisories/mfsa2026-48/
• https://www.mozilla.org/security/advisories/mfsa2026-50/
• https://www.mozilla.org/security/advisories/mfsa2026-51/