CVE-2026-92053
Received Received - Intake

Privilege Escalation in Firefox Graphics CanvasWebGL

Publication date: 2026-09-15

Last updated on: 2026-09-15

Assigner: Mozilla Corporation

Description
Privilege escalation in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156 and Firefox ESR 153.3.

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Meta Information

Published
2026-09-15
Last Modified
2026-09-15
Generated
2026-09-15
AI Q&A
2026-09-15
EPSS Evaluated
N/A
NVD
CVE-2026-92053
EUVD
EUVD-2026-78516

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox 156
mozilla firefox_esr 153.3

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-269 The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

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Executive Summary

This is a privilege escalation vulnerability in the Graphics: CanvasWebGL component of Firefox. It allows an attacker to gain higher privileges than intended, potentially leading to unauthorized access or control.

Detection Guidance

Detecting this vulnerability requires checking the installed version of Firefox or Firefox ESR. Compare the version against Firefox 156 or Firefox ESR 153.3. On Linux, use commands like 'firefox --version' or 'apt list --installed | grep firefox'.

Impact Analysis

An attacker could exploit this to escalate privileges, access sensitive data, or execute arbitrary code on your system. This could lead to data theft, system compromise, or further network intrusions.

Mitigation Strategies

Update Firefox to version 156 or Firefox ESR to version 153.3 or later immediately. Disable CanvasWebGL if updates are not immediately possible, though this may impact functionality.

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