What is GHSA-gggx-8wj9-87fx?

GHSA-gggx-8wj9-87fx is a security advisory published by GitHub Security Advisories with High severity. Same-origin policy bypass in the DevTools component. This vulnerability was fixed in Firefox ESR...

Which CVE IDs does GHSA-gggx-8wj9-87fx cover?

GHSA-gggx-8wj9-87fx covers the following CVE IDs: CVE-2026-100809. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-gggx-8wj9-87fx?

GHSA-gggx-8wj9-87fx has a CVSS v3 base score of 8.1, published by GitHub Security Advisories.

GHSA-gggx-8wj9-87fxHighCVSS 8.1

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

Vendor

GitHub Security Advisories

Published

September 29, 2026

Last Modified

October 1, 2026

🔗 CVE IDs covered (1)

CVE-2026-100809 →

📋 Description

Same-origin policy bypass in the DevTools component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.

🔗 References (7)

https://nvd.nist.gov/vuln/detail/CVE-2026-100809
https://bugzilla.mozilla.org/show_bug.cgi?id=2063658
https://www.mozilla.org/security/advisories/mfsa2026-100
https://www.mozilla.org/security/advisories/mfsa2026-97
https://www.mozilla.org/security/advisories/mfsa2026-101
https://www.mozilla.org/security/advisories/mfsa2026-103
https://github.com/advisories/GHSA-gggx-8wj9-87fx