Mozilla Firefox/Thunderbird CanvasWebGL Sandbox Escape (pre159/153.6)
CVE-2026-117988 Published on October 27, 2026
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 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
Vulnerability Analysis
CVE-2026-117988 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is a Buffer Overflow Vulnerability?
The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.
CVE-2026-117988 has been classified to as a Buffer Overflow vulnerability or weakness.
Products Associated with CVE-2026-117988
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