What is GHSA-m49g-cq5x-4jmc?

GHSA-m49g-cq5x-4jmc is a security advisory published by GitHub Security Advisories with Critical severity. Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in...

Which CVE IDs does GHSA-m49g-cq5x-4jmc cover?

GHSA-m49g-cq5x-4jmc covers the following CVE IDs: CVE-2026-8950. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-m49g-cq5x-4jmc?

GHSA-m49g-cq5x-4jmc has a CVSS v3 base score of 9.3, published by GitHub Security Advisories.

GHSA-m49g-cq5x-4jmcCriticalCVSS 9.3

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

Vendor

GitHub Security Advisories

Published

May 19, 2026

Last Modified

May 19, 2026

🔗 CVE IDs covered (1)

CVE-2026-8950 →

📋 Description

Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.

🔗 References (7)

https://nvd.nist.gov/vuln/detail/CVE-2026-8950
https://bugzilla.mozilla.org/show_bug.cgi?id=1965430
https://www.mozilla.org/security/advisories/mfsa2026-46
https://www.mozilla.org/security/advisories/mfsa2026-48
https://www.mozilla.org/security/advisories/mfsa2026-50
https://www.mozilla.org/security/advisories/mfsa2026-51
https://github.com/advisories/GHSA-m49g-cq5x-4jmc