CVE-2026-87591

Analyzed Analyzed - Analysis Complete

Incorrect Authorization in Google Chrome Extensions

Publication date: 2026-09-09

Last updated on: 2026-09-11

Assigner: Chrome

Description

Incorrect authorization in Extensions in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass system access restrictions via a crafted Chrome extension. (Chromium security severity: Medium)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-09

Last Modified

2026-09-11

Generated

2026-09-29

AI Q&A

2026-09-10

EPSS Evaluated

2026-09-27

NVD

CVE-2026-87591

EUVD

EUVD-2026-74425

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 153.0.8010.36 (exc)

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 involves incorrect authorization in Google Chrome's Extensions feature. A remote attacker could exploit it by creating a specially crafted Chrome extension to bypass system access restrictions, potentially gaining unauthorized access to sensitive functions or data.

Detection Guidance

This vulnerability involves incorrect authorization in Google Chrome extensions. To detect it, check installed extensions for untrusted or suspicious ones using Chrome's extension management page (chrome://extensions). Look for extensions with unusual permissions or unknown sources. No specific commands are provided in the context.

Impact Analysis

If exploited, this vulnerability could allow an attacker to bypass security controls on your system through a malicious Chrome extension. This might lead to unauthorized access to personal data, installation of additional malware, or other malicious activities without your knowledge.

Compliance Impact

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

Mitigation Strategies

Update Google Chrome to version 153.0.8010.36 or later to address the incorrect authorization issue in Extensions.

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