CVE-2026-92054 is a privilege escalation vulnerability affecting the Memory component of Mozilla Firefox. The issue allows an attacker to escalate privileges, potentially compromising the security context of the browser. Mozilla fixed this vulnerability in Firefox 156 and Firefox ESR 153.3 as part of a broader security update that addressed multiple high-impact vulnerabilities. The vendor advisory explicitly states the fix and assigns a high impact rating to this vulnerability.

The vulnerability enables privilege escalation within the Firefox browser, which could allow an attacker to execute actions with elevated permissions. This poses a significant security risk as it may lead to unauthorized access or control within the browser environment. The impact is rated high by Mozilla, indicating serious potential consequences if exploited.

Mozilla has released an official fix for this vulnerability in Firefox 156 and Firefox ESR 153.3. Users and administrators should update their Firefox installations to these versions or later to remediate this issue. No additional mitigation steps are required beyond applying the official update.