CVE-2026-121183

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Incorrect Authorization in Google Chrome Extensions

Publication date: 2026-11-03

Last updated on: 2026-11-03

Assigner: Chrome

Description

Incorrect authorization in Extensions in Google Chrome prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

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-2026-121183

EUVD

EUVD-2026-116468

Affected Vendors & Products

Vendor	Product	Version / Range
Google	Chrome	157.0.8103.38

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-863	The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

Executive Summary

This vulnerability is an incorrect authorization issue in Google Chrome's Extensions feature. It allows a remote attacker who has already compromised the renderer process to bypass sandboxing and execute arbitrary code outside the sandbox. This is done by tricking a user into visiting a specially crafted HTML page.

Impact Analysis

If exploited, this vulnerability could allow an attacker to run malicious code on your computer, potentially stealing data, installing malware, or taking control of your system. Since it bypasses Chrome's sandbox, it is more dangerous than typical web-based attacks.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR (data protection) and HIPAA (health information privacy) requirements. Organizations using affected Chrome versions may face compliance violations, legal penalties, and reputational damage if exploited.

Mitigation Strategies

Update Google Chrome to version 157.0.8103.38 or later to address the vulnerability.

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