CVE-2026-87471

Analyzed Analyzed - Analysis Complete

Incorrect Authorization in Google Chrome ServiceWorker

Publication date: 2026-09-09

Last updated on: 2026-09-10

Assigner: Chrome

Description

Incorrect authorization in ServiceWorker in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to bypass site isolation 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

2026-09-10

EPSS Evaluated

2026-09-27

NVD

CVE-2026-87471

EUVD

EUVD-2026-74324

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 ServiceWorker feature. A remote attacker who already compromised the renderer process could exploit this to bypass site isolation by using a specially crafted HTML page.

Detection Guidance

This vulnerability involves incorrect authorization in Google Chrome's ServiceWorker. Detection requires checking Chrome version and examining renderer process behavior. Update Chrome to version 153.0.8010.36 or later to patch the issue. No specific commands are provided in the context to detect active exploitation.

Impact Analysis

If you use an affected version of Chrome, an attacker could potentially access data from other sites you are logged into, increasing the risk of data theft or unauthorized actions on your behalf.

Compliance Impact

This vulnerability could lead to unauthorized data access, potentially violating GDPR's data protection principles or HIPAA's safeguards for protected health information if exploited.

Mitigation Strategies

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

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