MEDIUM 5.4 NVD
CVE-2026-113869
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
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.
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2075530
- https://www.mozilla.org/security/advisories/mfsa2026-114/
This medium severity vulnerability with a CVSS score of 5.4 was published on 2026-10-20 via NVD.
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