CVE-2025-8036

Description

Thunderbird cached CORS preflight responses across IP address changes. This allowed circumventing CORS with DNS rebinding. This vulnerability affects Firefox < 141, Firefox ESR < 140.1, Thunderbird < 141, and Thunderbird < 140.1.

Reserved 2025-07-22 | Published 2025-07-22 | Updated 2025-07-22 | Assigner mozilla

Problem types

DNS rebinding circumvents CORS

Product status

Any version before 141
affected

Any version before 140.1
affected

Any version before 141
affected

Any version before 140.1
affected

Credits

Viktor Bocz

References

bugzilla.mozilla.org/show_bug.cgi?id=1960834

www.mozilla.org/security/advisories/mfsa2025-56/

www.mozilla.org/security/advisories/mfsa2025-59/

www.mozilla.org/security/advisories/mfsa2025-61/

www.mozilla.org/security/advisories/mfsa2025-63/

cve.org (CVE-2025-8036)

nvd.nist.gov (CVE-2025-8036)

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