What is GHSA-ggf3-jcg3-q9f8?

GHSA-ggf3-jcg3-q9f8 is a security advisory published by GitHub Security Advisories with Critical severity. Same-origin policy bypass in the DevTools component. This vulnerability was fixed in Firefox 158.

Which CVE IDs does GHSA-ggf3-jcg3-q9f8 cover?

GHSA-ggf3-jcg3-q9f8 covers the following CVE IDs: CVE-2026-109772. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-ggf3-jcg3-q9f8?

GHSA-ggf3-jcg3-q9f8 has a CVSS v3 base score of 9.1, published by GitHub Security Advisories.

GHSA-ggf3-jcg3-q9f8CriticalCVSS 9.1

Same-origin policy bypass in the DevTools component. This vulnerability was fixed in Firefox 158.

Vendor

GitHub Security Advisories

Published

October 13, 2026

Last Modified

October 26, 2026

🔗 CVE IDs covered (1)

CVE-2026-109772 →

📋 Description

Same-origin policy bypass in the DevTools component. This vulnerability was fixed in Firefox 158.

🔗 References (5)

https://nvd.nist.gov/vuln/detail/CVE-2026-109772
https://bugzilla.mozilla.org/show_bug.cgi?id=2066063
https://www.mozilla.org/security/advisories/mfsa2026-106
https://www.mozilla.org/security/advisories/mfsa2026-109
https://github.com/advisories/GHSA-ggf3-jcg3-q9f8