CVE-2026-87436

Analyzed Analyzed - Analysis Complete

Incomplete Cleanup in Chrome Browser Allows Origin Policy Bypass

Publication date: 2026-09-09

Last updated on: 2026-09-10

Assigner: Chrome

Description

Incomplete cleanup in Browser in Google Chrome prior to 153.0.8010.36 allowed a remote attacker leveraging social engineering to bypass web origin policy via a crafted Chrome extension. (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

2026-09-30

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-87436

EUVD

EUVD-2026-74346

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-459	The product does not properly "clean up" and remove temporary or supporting resources after they have been used.

Attack-Flow Graph

Executive Summary

This vulnerability involves incomplete cleanup in Google Chrome's Browser component before version 153.0.8010.36. A remote attacker could exploit it by using a crafted Chrome extension to bypass web origin policy through social engineering tactics.

Detection Guidance

This vulnerability involves incomplete cleanup in Google Chrome's Browser component prior to version 153.0.8010.36, potentially allowing bypass of web origin policy via a crafted extension. Detection requires verifying Chrome version and inspecting installed extensions for suspicious activity.

Impact Analysis

An attacker could trick you into installing a malicious extension, allowing them to bypass security restrictions and potentially access sensitive data or perform unauthorized actions on websites you visit.

Compliance Impact

The vulnerability involves incomplete cleanup in Google Chrome allowing bypass of web origin policy via a crafted extension. This could potentially lead to unauthorized data access or manipulation, which may impact compliance with GDPR (data protection) or HIPAA (healthcare data privacy) if sensitive user data is exposed or altered.

Mitigation Strategies

Update Google Chrome to version 153.0.8010.36 or later to address the vulnerability.

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