CVE-2026-117990
Received Received - Intake

WebRender Sandbox Escape in Firefox

Publication date: 2026-10-27

Last updated on: 2026-10-27

Assigner: Mozilla Corporation

Description
Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.

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Meta Information

Published
2026-10-27
Last Modified
2026-10-27
Generated
2026-10-27
AI Q&A
2026-10-27
EPSS Evaluated
N/A
NVD
CVE-2026-117990
EUVD
EUVD-2026-111021

Affected Vendors & Products

Currently, no data is known.

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a sandbox escape vulnerability caused by incorrect boundary conditions in the Graphics: WebRender component of Firefox. It allows an attacker to break out of the sandboxed environment, potentially gaining unauthorized access to system resources.

Impact Analysis

If exploited, this vulnerability could allow an attacker to execute arbitrary code on your system with the same privileges as the Firefox process. This could lead to data theft, installation of malware, or further compromise of your system.

Mitigation Strategies

Update Firefox to version 159 or later and Firefox ESR to version 153.6 or later to address the sandbox escape vulnerability in the Graphics: WebRender component.

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