CVE-2026-12304
9.1 CRITICALSame-origin policy bypass in the Networking: Cookies component
Published: 2026-06-16 · Last updated: 2026-06-16
Severity and scoring
- CVSS
- 9.1 CRITICAL
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- CWE
- CWE-346
Description
Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-12304
- [Other]https://bugzilla.mozilla.org/show_bug.cgi?id=2034944
- [Other]https://www.mozilla.org/security/advisories/mfsa2026-57/
- [Other]https://www.mozilla.org/security/advisories/mfsa2026-58/
- [Other]https://www.mozilla.org/security/advisories/mfsa2026-60/
- [Other]https://www.mozilla.org/security/advisories/mfsa2026-61/
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