CVE-2026-12305
HIGH severity · CVSS 7.5 · Memory corruption
7.5CVSS HIGH
Summary
Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (2)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://www.mozilla.org/security/advisories/mfsa2026-57/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-58/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-60/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-61/Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=2037290