CVE-2026-17821

Analyzed Analyzed - Analysis Complete

Insufficient Policy Enforcement in Extensions in Google Chrome

Publication date: 2026-07-30

Last updated on: 2026-08-03

Assigner: Chrome

Description

Insufficient policy enforcement in Extensions in Google Chrome prior to 151.0.7922.72 allowed an attacker who convinced a user to install a malicious extension to bypass navigation restrictions via a crafted Chrome Extension. (Chromium security severity: Medium)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-30

Last Modified

2026-08-03

Generated

2026-08-19

AI Q&A

2026-07-30

EPSS Evaluated

2026-08-18

NVD

CVE-2026-17821

EUVD

EUVD-2026-50770

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 151.0.7922.72 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-602	The product is composed of a server that relies on the client to implement a mechanism that is intended to protect the server.

Attack-Flow Graph

Executive Summary

This vulnerability is due to insufficient policy enforcement in Google Chrome's Extensions feature. An attacker could trick a user into installing a malicious extension that bypasses navigation restrictions, potentially allowing unauthorized access or actions.

Detection Guidance

This vulnerability involves insufficient policy enforcement in Chrome Extensions. Detection requires checking installed extensions for unauthorized or suspicious ones. Review Chrome's extension list via chrome://extensions and look for unfamiliar extensions. No specific commands are provided in the CVE details.

Impact Analysis

If exploited, this flaw could let an attacker bypass navigation restrictions set by legitimate extensions or policies. This might lead to unauthorized access to sensitive data, phishing attacks, or redirection to malicious websites without the user's knowledge.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR's data protection principles or HIPAA's safeguards for protected health information. Compliance may be compromised if user data is exposed due to the bypass.

Mitigation Strategies

Update Google Chrome to version 151.0.7922.72 or later to address the insufficient policy enforcement in Extensions.

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