CVE-2026-87577

Analyzed Analyzed - Analysis Complete

Incorrect Authorization Bypass in Google Chrome

Publication date: 2026-09-09

Last updated on: 2026-09-10

Assigner: Chrome

Description

Incorrect authorization in Isolated in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass web origin policy into a privileged page via a crafted HTML page. (Chromium security severity: Medium)

CVSS Scores

EPSS Scores

Probability:
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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-2026-87577

EUVD

EUVD-2026-74332

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 before version 153.0.8010.36. A remote attacker could exploit a crafted HTML page to bypass web origin policy and access a privileged page.

Detection Guidance

Detection of this vulnerability requires checking the version of Google Chrome installed on your system. If the version is prior to 153.0.8010.36, the system is vulnerable. Use the command 'google-chrome --version' or check the version via the browser's 'About' page.

Impact Analysis

An attacker could potentially access sensitive pages or data on your system if you use a vulnerable Chrome version. This may lead to unauthorized information disclosure or other security breaches.

Compliance Impact

This vulnerability could lead to unauthorized data access, violating confidentiality requirements in GDPR and HIPAA. Organizations using affected Chrome versions may face compliance risks and potential penalties.

Mitigation Strategies

Immediately update Google Chrome to version 153.0.8010.36 or later. This can be done through the browser's built-in update mechanism or by downloading the latest version from the official Chrome website.

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