CVE-2026-87561

Modified Modified - Updated After Analysis

Incorrect Authorization in Chrome Web Authentication

Publication date: 2026-09-09

Last updated on: 2026-09-10

Assigner: Chrome

Description

Incorrect authorization in Web Authentication in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass web origin policy via a crafted Chrome extension. (Chromium security severity: Low)

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-09

Last Modified

2026-09-10

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-87561

EUVD

EUVD-2026-74437

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 Web Authentication within Google Chrome before version 153.0.8010.36. A remote attacker could exploit a crafted Chrome extension to bypass the web origin policy, potentially gaining unauthorized access to sensitive data or actions on a website.

Detection Guidance

This vulnerability involves incorrect authorization in Web Authentication in Google Chrome. Detection would require checking Chrome version and reviewing installed extensions for unauthorized access. No specific commands are provided in the context.

Impact Analysis

If you use an affected version of Chrome, an attacker could trick you into installing a malicious extension that bypasses security controls. This might allow them to access your accounts, steal data, or perform actions on your behalf without proper authorization.

Compliance Impact

This vulnerability allows unauthorized access to web origins, which could lead to data exposure or manipulation. For GDPR, this may violate principles of data protection and user rights. For HIPAA, it could risk protected health information if exploited via a malicious extension.

Mitigation Strategies

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

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