CVE-2026-0878highCWE-119 CWE-20

Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8epss 0.5%

exploitation probability

0.5%top 60% of all CVEs

observed exploitation

nono source reports it

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.

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

Affected products

Mozilla · Firefox Mozilla · Thunderbird

References