CVE-2026-0878

HighCVSS 8.0/10Last modified Jul 15, 2026

Description

Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

Metrics

CVSS 3.1 8.0/10CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

Weakness enumeration

CWE-20CWE-119

Affected software

No affected versions have been published.

Timeline

Published
Jan 13, 2026
Last modified
Jul 15, 2026
NVD status
Modified

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CVE-2026-0878: High severity, CVSS 8.0 | Vulnix