CVE-2026-87557

Modified Modified - Updated After Analysis

Missing Authorization in Google Chrome LocalNetworkAccess

Publication date: 2026-09-09

Last updated on: 2026-09-10

Assigner: Chrome

Description

Missing authorization in LocalNetworkAccess in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to bypass system access restrictions via a crafted HTML page. (Chromium security severity: Medium)

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-09

Last Modified

2026-09-10

Generated

2026-09-29

AI Q&A

2026-09-10

EPSS Evaluated

2026-09-27

NVD

CVE-2026-87557

EUVD

EUVD-2026-74319

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 missing authorization in Google Chrome's LocalNetworkAccess feature. It allows a remote attacker who has already compromised the renderer process to bypass system access restrictions by using a specially crafted HTML page.

Detection Guidance

This vulnerability involves missing authorization in LocalNetworkAccess in Google Chrome. Detection primarily requires checking the Chrome version and monitoring for suspicious renderer process activity. Ensure Chrome is updated to version 153.0.8010.36 or later to mitigate the issue.

Impact Analysis

If exploited, this vulnerability could allow an attacker to bypass security restrictions on your system. This might enable unauthorized access to local network resources or sensitive data, depending on the attacker's goals and the compromised environment.

Compliance Impact

The vulnerability allows unauthorized access to local network resources via a compromised renderer process, which could lead to data exposure or unauthorized system interactions. This may violate compliance requirements for data protection standards like GDPR (data confidentiality) and HIPAA (system access controls), depending on the affected system's use case.

Mitigation Strategies

Update Google Chrome to version 153.0.8010.36 or later to address the missing authorization issue in LocalNetworkAccess.

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