CVE-2026-84637

Description

Malicious calendar invitations could use file URI attachments to launch local or network-hosted executables on Windows, bypassing Thunderbird's normal executable attachment protections. With the new invitation display enabled, the attachment could also appear under a misleading filename. This vulnerability was fixed in Thunderbird 154 and Thunderbird 153.2.

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Produits concernés

• Mozilla Thunderbird

Scores CVSS

Faiblesses (CWE)

• CWE-434

Références

• https://bugzilla.mozilla.org/show_bug.cgi?id=2043878 Permissions Required
• https://www.mozilla.org/security/advisories/mfsa2026-78/ Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2026-88/ Vendor Advisory

Ailleurs

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