CRITICALCVSS 9.1

CVE-2026-12304

CVE-2026-12304 updated by NVD

Modified: 2026-10-28
Sources: nvd

Summary

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.

References

https://nvd.nist.gov/vuln/detail/CVE-2026-12304

Includes data from the National Vulnerability Database (NIST). NVD data is in the public domain; this page is not endorsed by NIST.

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