What is GHSA-2h4f-4mx5-4hwr?

GHSA-2h4f-4mx5-4hwr is a security advisory published by GitHub Security Advisories with Critical severity. Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153.

Which CVE IDs does GHSA-2h4f-4mx5-4hwr cover?

GHSA-2h4f-4mx5-4hwr covers the following CVE IDs: CVE-2026-16366. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-2h4f-4mx5-4hwr?

GHSA-2h4f-4mx5-4hwr has a CVSS v3 base score of 9.8, published by GitHub Security Advisories.

GHSA-2h4f-4mx5-4hwrCriticalCVSS 9.8

Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153.

Vendor

GitHub Security Advisories

Published

July 21, 2026

Last Modified

July 22, 2026

🔗 CVE IDs covered (1)

CVE-2026-16366 →

📋 Description

Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153.

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-16366
https://bugzilla.mozilla.org/show_bug.cgi?id=2049181
https://www.mozilla.org/security/advisories/mfsa2026-68
https://github.com/advisories/GHSA-2h4f-4mx5-4hwr