Vulnerability record · CVE-2026-92052 · published 15 September 2026

CVE-2026-92052: Privilege escalation due to uninitialized memory in the Graphics: CanvasWebGL component.

Privilege escalation due to uninitialized memory in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

8.8 CVSS 3.1 High EPSS 0.26% · top 84.6% CWE-457 · CWE-457 Awaiting Analysis

8.8CVSS 3.1 base score

0.26%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

5References

16 Sep 2026Last modified by NVD

Description

Privilege escalation due to uninitialized memory in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Link	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2061499
https://www.mozilla.org/security/advisories/mfsa2026-90/
https://www.mozilla.org/security/advisories/mfsa2026-93/
https://www.mozilla.org/security/advisories/mfsa2026-94/
https://www.mozilla.org/security/advisories/mfsa2026-96/

Track CVE-2026-92052 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.3CVE-2025-5777Citrix NetScaler ADC/Gateway memory overread via insufficient input validationCVE-2025-5777 is an insufficient input validation flaw in Citrix NetScaler ADC and NetScaler Gateway that causes a memory overread when the appliance…KEVEPSS 100%analysed17 Jun 2025

Source: NIST National Vulnerability Database (record CVE-2026-92052), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.