CVE-2026-118023
Received Received - Intake

Graphics: WebRender Use-After-Free Sandbox Escape

Publication date: 2026-10-27

Last updated on: 2026-10-27

Assigner: Mozilla Corporation

Description
Sandbox escape due to use-after-free in the Graphics: WebRender component. This vulnerability was fixed in Firefox 159.

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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-2026-118023
EUVD
EUVD-2026-110921

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 a use-after-free issue in the Graphics: WebRender component of Firefox. A use-after-free occurs when a program continues to use memory after it has been freed, potentially allowing attackers to execute arbitrary code or gain elevated privileges. The vulnerability was patched in Firefox version 159.

Impact Analysis

If exploited, this vulnerability could allow an attacker to escape the browser sandbox and run malicious code on your system with the same privileges as the browser. This could lead to data theft, installation of malware, or further compromise of your device. Users running vulnerable versions of Firefox are at risk.

Mitigation Strategies

Update Firefox to version 159 or later to patch the Graphics: WebRender use-after-free vulnerability that enables sandbox escape.

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