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CVE-2026-113869

5.4 medium SSVC exploitation: none Published
NVD · CVE.org

When Thunderbird asked for a security device password (for example a smartcard PIN or the Primary Password) while decrypting an S/MIME message, the message load could finish or be cancelled while the prompt was open. This freed the message decoder while it was still in use, causing a use-after-free and a potentially exploitable crash. This vulnerability was fixed in Thunderbird 158.0.1 and Thunderbird 153.6.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 8

  1. StatusAwaiting Analysis → PublishedNVD modified 2026-10-27 18:30
  2. References+1 references (now 3)NVD modified 2026-10-27 19:17
  3. StatusPublished → Awaiting AnalysisNVD modified 2026-10-27 19:17
  4. StatusAwaiting Analysis → PublishedNVD modified 2026-10-27 18:30
  5. Description
    When Thunderbird asked for a security device password (for example a smartcard PIN or the Primary Password) while decrypting an S/MIME message, the message load could finish or be cancelled while the prompt was open. This freed the message decoder while it was still in use, causing a use-after-free and a potentially exploitable crash. This vulnerability was fixed in Thunderbird 158.0.1.When Thunderbird asked for a security device password (for example a smartcard PIN or the Primary Password) while decrypting an S/MIME message, the message load could finish or be cancelled while the prompt was open. This freed the message decoder while it was still in use, causing a use-after-free and a potentially exploitable crash. This vulnerability was fixed in Thunderbird 158.0.1 and Thunderbird 153.6.
    NVD modified 2026-10-27 18:30
  6. StatusPublished → Awaiting AnalysisNVD modified 2026-10-22 17:36
  7. StatusReceived → PublishedNVD modified 2026-10-20 19:42
  8. First seenCVSS 5.4NVD modified 2026-10-20 20:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 3