Privilege Escalation Vulnerability in Firefox by Mozilla
CVE-2026-92053

8.8HIGH

Key Information:

Vendor

Mozilla
Status
Firefox
Vendor
CVE Published:
15 September 2026

What is CVE-2026-92053?

A privilege escalation vulnerability in the Graphics: CanvasWebGL component of Firefox allows for unauthorized access to system resources. This issue affects versions prior to the fix implemented in Firefox 156 and Firefox ESR 153.3, potentially enabling attackers to elevate their permissions and exploit system capabilities. Users are advised to update their browsers promptly to mitigate associated risks.

Affected Version(s)

Firefox 153.3

Firefox 156

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2061503
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

Mozilla
.