CVE-2026-121083

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Use After Free in Google Chrome Compositing

Publication date: 2026-11-03

Last updated on: 2026-11-03

Assigner: Chrome

Description

Use after free in Compositing in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)

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Meta Information

Published

2026-11-03

Last Modified

2026-11-03

Generated

2026-11-04

AI Q&A

2026-11-04

EPSS Evaluated

N/A

NVD

CVE-2026-121083

EUVD

EUVD-2026-116525

Affected Vendors & Products

Vendor	Product	Version / Range
Google	Chrome	157.0.8103.38

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This vulnerability is a use-after-free issue in the Compositing component of Google Chrome. It occurs when a program tries to use memory after it has been freed, potentially leading to arbitrary code execution. An attacker could exploit this by tricking a user into visiting a specially crafted HTML page, which may allow code to run inside the browser's sandbox.

Detection Guidance

This vulnerability is specific to Google Chrome versions prior to 157.0.8103.38. To detect it, check your Chrome version by running chrome://version/ in the browser address bar. If the version is below 157.0.8103.38, the system is vulnerable.

Impact Analysis

If exploited, this vulnerability could allow an attacker to execute arbitrary code on your system, potentially leading to data theft, installation of malware, or unauthorized access. Since it affects Chrome, users browsing the web could be at risk if they visit a malicious site.

Mitigation Strategies

Update Google Chrome to version 157.0.8103.38 or later immediately. This can be done via the browser's built-in update mechanism or by downloading the latest version from Google's official site.

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