Vulnerability · NVD

CVE-2026-118175

CVE-2026-118175, Severity pending severity (CVSS —): 1 tracked app concerned, all fixed or indeterminable on their current version.

Severity (CVSS): -
Exploitation: -
Tracked apps: 1
Still exposed: 0

Published on 2026-10-27

When replying to, forwarding, or editing a crafted email message as new, Thunderbird could embed parts of a different message stored in the same folder into the message being composed, without showing a blocked content warning. If the user sent the message, the content of the other message was disclosed to the recipients. This vulnerability was fixed in Thunderbird 159 and Thunderbird 153.6.

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 <159 Fixed in 159 Latest tracked 159.0 patched

Observed affected builds (137)

158.0.1 158.0 157.0.1 157.0 156.0.1 156.0 155.0.1 155.0 154.0 153.0.3 153.0.2 153.0.1 153.0 152.0.1 152.0 151.0.1 151.0 150.0.2 150.0.1 150.0 149.0.2 149.0.1 149.0 148.0.1 148.0 147.0.2 147.0.1 147.0 146.0.1 146.0 +107 · see history

Vulnerable CPE configurations (1)

Vendor	Product	Platform	Versions	CPE 2.3 URI
mozilla	thunderbird All platforms (wildcard)	All platforms (wildcard)	<159	cpe:2.3:a:mozilla:thunderbird::::::::

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