CVE-2026-121188

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Use After Free in Google Chrome PerformanceAPIs

Publication date: 2026-11-03

Last updated on: 2026-11-03

Assigner: Chrome

Description

Use after free in PerformanceAPIs 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)

CVSS Scores

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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-2026-121188

EUVD

EUVD-2026-116522

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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 PerformanceAPIs component of Google Chrome versions before 157.0.8103.38. A use-after-free occurs when a program continues to use memory after it has been freed, potentially leading to arbitrary code execution. In this case, a remote attacker could exploit this by crafting a malicious HTML page to trigger the flaw.

Detection Guidance

Detection of this vulnerability requires checking the installed version of Google Chrome. Compare the version against 157.0.8103.38. If your version is older, the system is vulnerable. Use commands like 'google-chrome --version' or check via package manager (e.g., 'apt list --installed | grep chrome' for Debian-based systems).

No direct detection commands for exploitation are provided in the context. Focus on version verification and monitoring for unusual behavior.

Impact Analysis

If exploited, this vulnerability could allow a remote attacker to execute arbitrary code on your system. This could lead to unauthorized access, data theft, or installation of malware. Users are impacted if they use an unpatched version of Chrome.

Mitigation Strategies

Immediately update Google Chrome to version 157.0.8103.38 or later. Disable automatic updates temporarily if needed, but prioritize patching. Avoid visiting untrusted websites until patched.

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