CVE-2026-16396 PUBLISHED

Privilege escalation in WebExtensions. This vulnerability was fixed in Firefox 153 and Firefox ESR 140.13.

• Quy Pham

• https://bugzilla.mozilla.org/show_bug.cgi?id=2047240
• https://www.mozilla.org/security/advisories/mfsa2026-68/
• https://www.mozilla.org/security/advisories/mfsa2026-70/