CVE-2026-113869 — Use-after-free in S/MIME decryption during a security device password prompt
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 …
Published: 2026-10-20 · CVSS: 5.4 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7