What is GHSA-j8xr-5v62-3rx4?

GHSA-j8xr-5v62-3rx4 is a security advisory published by GitHub Security Advisories with Critical severity. Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in...

Which CVE IDs does GHSA-j8xr-5v62-3rx4 cover?

GHSA-j8xr-5v62-3rx4 covers the following CVE IDs: CVE-2026-12304. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-j8xr-5v62-3rx4?

GHSA-j8xr-5v62-3rx4 has a CVSS v3 base score of 9.1, published by GitHub Security Advisories.

GHSA-j8xr-5v62-3rx4CriticalCVSS 9.1

Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in...

Vendor

GitHub Security Advisories

Published

June 16, 2026

Last Modified

June 16, 2026

🔗 CVE IDs covered (1)

CVE-2026-12304 →

📋 Description

Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 152 and Firefox ESR 140.12.

🔗 References (7)

https://nvd.nist.gov/vuln/detail/CVE-2026-12304
https://bugzilla.mozilla.org/show_bug.cgi?id=2034944
https://www.mozilla.org/security/advisories/mfsa2026-57
https://www.mozilla.org/security/advisories/mfsa2026-58
https://www.mozilla.org/security/advisories/mfsa2026-60
https://www.mozilla.org/security/advisories/mfsa2026-61
https://github.com/advisories/GHSA-j8xr-5v62-3rx4