MFSA2026-79: Security Vulnerabilities fixed in Thunderbird 140.14

Affected Software

Remediation

Recommended actions to resolve this vulnerability, in priority order.

1. Upgrade

   Upgrade to a fixed release to a version that resolves this vulnerability.

   Fixed in 140.14

Event History

Child vulnerabilities

Contains the following vulnerabilities.

• CVE-2026-74934
• CVE-2026-74935
• CVE-2026-74936
• CVE-2026-74939
• CVE-2026-74940
• CVE-2026-74941
• CVE-2026-74942
• CVE-2026-74943
• CVE-2026-74944
• CVE-2026-74945
• CVE-2026-74946
• CVE-2026-74948
• CVE-2026-74949
• CVE-2026-74953
• CVE-2026-74957
• CVE-2026-74959
• CVE-2026-74960
• CVE-2026-74962
• CVE-2026-74963
• CVE-2026-74964
• CVE-2026-74965
• CVE-2026-74967
• CVE-2026-74969
• CVE-2026-74971
• CVE-2026-74972
• CVE-2026-74973
• CVE-2026-74974
• CVE-2026-74976
• CVE-2026-74983
• CVE-2026-74987
• CVE-2026-74990