CVE-2026-84143

Description

Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

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Produits concernés

• Mozilla Firefox
• Mozilla Thunderbird

Scores CVSS

Faiblesses (CWE)

• CWE-119
• CWE-200

Références

• https://bugzilla.mozilla.org/buglist.cgi?bug_id=2048793%2C2054645%2C2057114%2C2059109%2C2061287 Issue Tracking
• https://bugzilla.mozilla.org/buglist.cgi?bug_id=2054631%2C2054657%2C2055007%2C2055681%2C2057107%2C2058087%2C2058088%2C2058090%2C2058095%2C2058101%2C2059183%2C2059185%2C2061301%2C2061325 Issue Tracking
• https://bugzilla.mozilla.org/show_bug.cgi?id=2057108 Issue Tracking
• https://www.mozilla.org/security/advisories/mfsa2026-82/ Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2026-84/ Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2026-85/ Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2026-86/ Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2026-87/ Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2026-88/ Vendor Advisory

Ailleurs

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