CVE-2026-113869
Medium · 5.4CVSS
5.4
EPSS
0.3%
Published
Oct 20, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
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