CVE-2026-92007
Received Received - Intake

Privilege Escalation in Firefox CanvasWebGL

Publication date: 2026-09-15

Last updated on: 2026-09-15

Assigner: Mozilla Corporation

Description
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, 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-2026-92007
EUVD
EUVD-2026-78470

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
mozilla firefox 156
mozilla firefox_esr 115.41
mozilla firefox_esr 140.16
mozilla firefox_esr 153.3

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-120 The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

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Executive Summary

This is a privilege escalation vulnerability caused by incorrect boundary conditions in the Graphics: CanvasWebGL component of Firefox. It allows attackers to gain higher privileges than intended.

Detection Guidance

To detect this vulnerability, check the installed version of Firefox or Firefox ESR on your system. Compare it against the fixed versions: Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, or Firefox ESR 153.3. Use commands like 'firefox --version' or 'apt show firefox' (Linux) to verify the version.

Impact Analysis

An attacker could exploit this to gain elevated privileges on your system, potentially allowing them to install malware, access sensitive data, or perform unauthorized actions.

Compliance Impact

The vulnerability involves privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This could allow unauthorized access or control, potentially compromising sensitive data. Such issues may impact compliance with GDPR (data protection) and HIPAA (health data privacy) by increasing risks of unauthorized data exposure or breaches.

Mitigation Strategies

Immediately update Firefox to version 156 or Firefox ESR to versions 115.41, 140.16, or 153.3. If automatic updates are disabled, manually download and install the latest version from Mozilla's official website to patch the Graphics: CanvasWebGL boundary condition issue.

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