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HIGHCVE-2026-0878Published Modified CNA mozilla

CVE-2026-0878: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component

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 v3.1
8.0
Severity
HIGH
Fixed in
140.7
Affected Products
2

Fix available

140.7147
Affected packages
  • Mozilla / Firefox
    Fixed in 140.7, 147
  • Mozilla / Thunderbird
    Fixed in 140.7, 147
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
References