What is GHSA-q7p7-m6qg-cwfw?

GHSA-q7p7-m6qg-cwfw is a security advisory published by GitHub Security Advisories with Critical severity. Same-origin policy bypass in the DOM: Service Workers component. This vulnerability was fixed in...

Which CVE IDs does GHSA-q7p7-m6qg-cwfw cover?

GHSA-q7p7-m6qg-cwfw covers the following CVE IDs: CVE-2026-74956. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-q7p7-m6qg-cwfw?

GHSA-q7p7-m6qg-cwfw has a CVSS v3 base score of 9.1, published by GitHub Security Advisories.

GHSA-q7p7-m6qg-cwfwCriticalCVSS 9.1

Same-origin policy bypass in the DOM: Service Workers component. This vulnerability was fixed in...

Vendor

GitHub Security Advisories

Published

August 18, 2026

Last Modified

August 18, 2026

🔗 CVE IDs covered (1)

CVE-2026-74956 →

📋 Description

Same-origin policy bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 154 and Firefox ESR 153.1.

🔗 References (7)

https://nvd.nist.gov/vuln/detail/CVE-2026-74956
https://bugzilla.mozilla.org/show_bug.cgi?id=2032406
https://www.mozilla.org/security/advisories/mfsa2026-74
https://www.mozilla.org/security/advisories/mfsa2026-77
https://www.mozilla.org/security/advisories/mfsa2026-78
https://www.mozilla.org/security/advisories/mfsa2026-80
https://github.com/advisories/GHSA-q7p7-m6qg-cwfw