CVE-2026-17821: Insufficient policy enforcement in Google Chrome
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)
AI Analysis
Technical Summary
CVE-2026-17821 describes a vulnerability in Google Chrome's extension policy enforcement mechanism before version 151.0.7922.72. The insufficient enforcement allows a malicious extension, installed after user consent, to bypass navigation restrictions that are normally enforced by Chrome. This could enable the extension to perform actions beyond intended policy constraints. The vulnerability is rated medium severity by Chromium security, but no CVSS score or detailed impact metrics are provided. There is no explicit vendor advisory or patch information included in the provided data.
Potential Impact
An attacker who successfully convinces a user to install a crafted malicious Chrome extension can bypass navigation restrictions intended to limit extension behavior. This could lead to unauthorized navigation actions within the browser context. No further impact details or exploitation reports are available.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should update Google Chrome to version 151.0.7922.72 or later once available. Until then, exercise caution when installing extensions, especially from untrusted sources.
CVE-2026-17821: Insufficient policy enforcement in Google 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)
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-17821 describes a vulnerability in Google Chrome's extension policy enforcement mechanism before version 151.0.7922.72. The insufficient enforcement allows a malicious extension, installed after user consent, to bypass navigation restrictions that are normally enforced by Chrome. This could enable the extension to perform actions beyond intended policy constraints. The vulnerability is rated medium severity by Chromium security, but no CVSS score or detailed impact metrics are provided. There is no explicit vendor advisory or patch information included in the provided data.
Potential Impact
An attacker who successfully convinces a user to install a crafted malicious Chrome extension can bypass navigation restrictions intended to limit extension behavior. This could lead to unauthorized navigation actions within the browser context. No further impact details or exploitation reports are available.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should update Google Chrome to version 151.0.7922.72 or later once available. Until then, exercise caution when installing extensions, especially from untrusted sources.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-9c37-rj77-8q8m
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-17821"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a6ae5189c2644c7f8981a98
Added to database: 07/30/2026, 05:46:00 UTC
Last enriched: 07/30/2026, 06:19:40 UTC
Last updated: 07/31/2026, 02:51:53 UTC
Views: 4
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