{"id":"CVE-2026-113869","title":"Use-after-free in S/MIME decryption during a security device password prompt","summary":"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 messa…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L","cvssSource":"adp","vendor":"Mozilla","product":"Thunderbird","affected":["Thunderbird"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-20T19:42:14.775611Z"},"published":"2026-10-20","updated":"2026-10-20","sourceUpdated":"2026-10-20T19:42:17.936Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-113869","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2075530"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-114/"}],"tags":["cve.org"],"ingestedAt":"2026-10-20T20:18:14.533Z","slug":"CVE-2026-113869","body":"## Overview\n\nWhen 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.\n\n## Affected\n\n- `Thunderbird`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}