What is GHSA-mv5v-6jcr-38x5?

GHSA-mv5v-6jcr-38x5 is a security advisory published by GitHub Security Advisories with High severity. Privilege escalation in the WebExtensions component. This vulnerability was fixed in Firefox 158...

Which CVE IDs does GHSA-mv5v-6jcr-38x5 cover?

GHSA-mv5v-6jcr-38x5 covers the following CVE IDs: CVE-2026-109778. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-mv5v-6jcr-38x5?

GHSA-mv5v-6jcr-38x5 has a CVSS v3 base score of 8.8, published by GitHub Security Advisories.

GHSA-mv5v-6jcr-38x5HighCVSS 8.8

Privilege escalation in the WebExtensions component. This vulnerability was fixed in Firefox 158...

Vendor

GitHub Security Advisories

Published

October 13, 2026

Last Modified

October 13, 2026

🔗 CVE IDs covered (1)

CVE-2026-109778 →

📋 Description

Privilege escalation in the WebExtensions component. This vulnerability was fixed in Firefox 158 and Firefox ESR 153.5.

🔗 References (7)

https://nvd.nist.gov/vuln/detail/CVE-2026-109778
https://bugzilla.mozilla.org/show_bug.cgi?id=2070547
https://www.mozilla.org/security/advisories/mfsa2026-106
https://www.mozilla.org/security/advisories/mfsa2026-108
https://www.mozilla.org/security/advisories/mfsa2026-109
https://www.mozilla.org/security/advisories/mfsa2026-110
https://github.com/advisories/GHSA-mv5v-6jcr-38x5