Description
Thunderbird cached CORS preflight responses across IP address changes. This allowed circumventing CORS with DNS rebinding. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Mozilla Firefox
140.1 to ≤ 140.*unaffected141 to ≤ *unaffected
Mozilla Thunderbird
140.1 to ≤ 140.*unaffected141 to ≤ *unaffected
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1960834 ↗
- https://www.mozilla.org/security/advisories/mfsa2025-56/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-59/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-61/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-63/ ↗
- https://www.kb.cert.org/vuls/id/652514 ↗