What is GHSA-x563-34jc-9396?

GHSA-x563-34jc-9396 is a security advisory published by GitHub Security Advisories with Critical severity. Mitigation bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox...

Which CVE IDs does GHSA-x563-34jc-9396 cover?

GHSA-x563-34jc-9396 covers the following CVE IDs: CVE-2026-16407. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-x563-34jc-9396?

GHSA-x563-34jc-9396 has a CVSS v3 base score of 9.8, published by GitHub Security Advisories.

GHSA-x563-34jc-9396CriticalCVSS 9.8

Mitigation bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox...

Vendor

GitHub Security Advisories

Published

July 21, 2026

Last Modified

July 22, 2026

🔗 CVE IDs covered (1)

CVE-2026-16407 →

📋 Description

Mitigation bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 153.

🔗 References (5)

https://nvd.nist.gov/vuln/detail/CVE-2026-16407
https://bugzilla.mozilla.org/show_bug.cgi?id=2044063
https://www.mozilla.org/security/advisories/mfsa2026-68
https://www.mozilla.org/security/advisories/mfsa2026-71
https://github.com/advisories/GHSA-x563-34jc-9396