Privilege Escalation Vulnerability in Firefox by Mozilla
CVE-2026-92054

8.8HIGH

Key Information:

Vendor

Mozilla
Status
Firefox
Vendor
CVE Published:
15 September 2026

What is CVE-2026-92054?

A privilege escalation vulnerability in the Memory component of Firefox could allow an attacker to gain unauthorized access to sensitive information or system resources. This issue has been addressed in Firefox version 156 and Firefox ESR version 153.3, ensuring enhanced security for users.

Affected Version(s)

Firefox 153.3

Firefox 156

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2062551
https://www.mozilla.org/security/advisories/mfsa2026-90/
https://www.mozilla.org/security/advisories/mfsa2026-93/

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Amy Burnett of OpenAI
.