Vulnerability · NVD

CVE-2026-113869

CVE-2026-113869, medium severity (CVSS 5.4): 1 tracked app concerned, 1 still exposed on its current version.

Severity (CVSS): 5.4
Exploitation: -
Tracked apps: 1
Still exposed: 1

Published on 2026-10-20

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.

Attack vector : Network No user interaction

Show raw CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

Tracked apps referencing this CVE

For each app: the affected range, the fixing version, and where the tracked app stands today.

Mozilla Thunderbird Windows winget:Mozilla.Thunderbird

Affected <158.0.1 Fixed in 158.0.1 Latest tracked 158.0 still vulnerable

Observed affected builds (136)

158.0 157.0.1 157.0 156.0.1 156.0 155.0.1 155.0 154.0 153.0.3 153.0.2 153.0.1 153.0 152.0.1 152.0 151.0.1 151.0 150.0.2 150.0.1 150.0 149.0.2 149.0.1 149.0 148.0.1 148.0 147.0.2 147.0.1 147.0 146.0.1 146.0 145.0 +106 · see history

Vulnerable CPE configurations (1)

Vendor	Product	Platform	Versions	CPE 2.3 URI
mozilla	thunderbird All platforms (wildcard)	All platforms (wildcard)	<158.0.1	cpe:2.3:a:mozilla:thunderbird::::::::

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