CVE-2026-14899

7.5 Élevée

Publiée le 22/07/2026 à 22:16 · Modifiée le 24/10/2026 à 15:10 · Analysée par le NVD · Source : security@mozilla.org

Description

The code to parse MIME headers for display when forwarding a message (if the setting to view all headers was enabled) had an off-by-one error, allowing a single byte to be read from the memory after the buffer for the headers, and potentially crashing Thunderbird. This vulnerability was fixed in Thunderbird 153 and Thunderbird 140.13.

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Produits concernés

Mozilla Thunderbird

Scores CVSS

Version	Score	Source	Vecteur
3.1	7.5 Élevée	134c704f-9b21-4f2e-91b3-4a467353bcc0	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`

Faiblesses (CWE)

CWE-193

Références

https://bugzilla.mozilla.org/show_bug.cgi?id=2046137 Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-71/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-72/ Vendor Advisory

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories