CVE-2026-87611

Analyzed Analyzed - Analysis Complete

Missing Authorization in Google Chrome FileSystem

Publication date: 2026-09-09

Last updated on: 2026-09-09

Assigner: Chrome

Description

Missing authorization in FileSystem in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to obtain cross-origin data 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

2026-09-09

Generated

2026-09-29

AI Q&A

2026-09-10

EPSS Evaluated

2026-09-27

NVD

CVE-2026-87611

EUVD

EUVD-2026-74308

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

This vulnerability involves a missing authorization check in Google Chrome's FileSystem component. A remote attacker who has already compromised the renderer process could exploit this to access cross-origin data by tricking a user into visiting a specially crafted HTML page.

Detection Guidance

Detection requires monitoring for unauthorized cross-origin data access attempts in Chrome versions prior to 153.0.8010.36. Check Chrome version with 'google-chrome --version' and compare against 153.0.8010.36. Inspect renderer process logs for suspicious HTML page interactions.

Impact Analysis

If you use Google Chrome versions prior to 153.0.8010.36, an attacker could potentially steal sensitive data from other websites you visit by exploiting this flaw. This could include personal information, login credentials, or other confidential data.

Compliance Impact

This vulnerability could lead to unauthorized data access, which may violate GDPR's data protection requirements or HIPAA's safeguards for protected health information. Organizations using vulnerable Chrome versions may face compliance risks if data breaches occur.

Mitigation Strategies

Update Google Chrome to version 153.0.8010.36 or later immediately. Disable automatic updates temporarily if needed, but prioritize patching. Monitor for unusual renderer process activity as a potential sign of exploitation.

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