CVE-2026-12307

Description

Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2038133 ↗
• https://www.mozilla.org/security/advisories/mfsa2026-57/ ↗
• https://www.mozilla.org/security/advisories/mfsa2026-58/ ↗
• https://www.mozilla.org/security/advisories/mfsa2026-60/ ↗
• https://www.mozilla.org/security/advisories/mfsa2026-61/ ↗