CVE-2026-92010
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 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-2026-92010
EUVD
EUVD-2026-78473

Affected Vendors & Products

Showing 5 associated CPEs
Vendor Product Version / Range
mozilla firefox 156
mozilla firefox_esr 115.41
mozilla firefox_esr 140.16
mozilla firefox_esr 153.3
mozilla firefox esr

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 vulnerability is a privilege escalation issue caused by incorrect boundary conditions in the Graphics: CanvasWebGL component of Firefox browsers. It allows attackers to gain elevated privileges beyond normal user permissions.

Detection Guidance

Detecting this vulnerability requires checking the installed version of Firefox or Firefox ESR. Compare your version against the fixed releases: Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, or Firefox ESR 153.3. Use commands like 'firefox --version' or 'apt show firefox' to check versions.

Impact Analysis

If exploited, this vulnerability could let an attacker perform unauthorized actions on your system, such as accessing sensitive data, installing malware, or taking control of your browser sessions. Users of affected Firefox versions are at risk until they update.

Compliance Impact

This vulnerability allows privilege escalation through incorrect boundary conditions in the Graphics: CanvasWebGL component, which could lead to unauthorized access or control. Such issues may violate compliance requirements under GDPR (data protection) and HIPAA (health data security) by enabling unauthorized data access or modification.

Mitigation Strategies

Immediately update Firefox to version 156 or Firefox ESR to versions 115.41, 140.16, or 153.3. Disable CanvasWebGL if updates are not immediately possible. Monitor Mozilla's security advisories for further guidance.

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