CVE-2025-8036
DNS rebinding circumvents CORS
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | mozilla |
| Product | firefox |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 22, 2025 |
| Last Updated | Apr 13, 2026 |
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Affected Versions
Mozilla / Firefox
All versions affected Mozilla / Thunderbird
All versions affected References
bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=1960834 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-56/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-59/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-61/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-63/ kb.cert.org: https://www.kb.cert.org/vuls/id/652514
Credits
Viktor Bocz