CVE-2026-109719

4.2Medium

Published 13 Oct 2026 · NVD status: Deferred · AI triage by gemini-3.8-flash

4.2Medium

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: Required
Impact: Limited impact
Weakness: CWE-362, CWE-416

Impact

Remote attackers can potentially manipulate browser memory to alter integrity or read unauthorized data if a user visits a malicious page. An attacker needs to trick the user into visiting a crafted WebGL page.

Root cause

A race condition in the CanvasWebGL graphics component leads to a use-after-free error.

Affected systems

Firefox versions prior to 158, Firefox ESR prior to 115.43 and 153.5, and Thunderbird versions prior to 158 and 153.5.

CVSS v3.1 · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

Fix & remediation

Upgrade to Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, or Thunderbird 153.5. As an interim workaround, disable WebGL by setting webgl.disabled to true in about:config.

shell

$ sudo apt-get update && sudo apt-get install --only-upgrade firefox thunderbird

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

Race condition, use-after-free in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-109719