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CVE-2026-17976: Policy bypass in Google Chrome

0
Medium
VulnerabilityCVE-2026-17976cvecve-2026-17976
Published: 07/30/2026 (07/30/2026, 00:25:51 UTC)
Source: CVE Database V5
Vendor/Project: Google
Product: Chrome

Description

CVE-2026-17976 is a policy bypass vulnerability in Google Chrome affecting versions prior to 151.0.7922.72. The flaw involves insufficient policy enforcement in Chrome Extensions, allowing an attacker who convinces a user to install a malicious extension to bypass discretionary access control using a crafted domain name. The vulnerability has a low Chromium security severity and a CVSS score of 4.3 (medium severity). No known exploits are reported in the wild. The vendor advisory does not explicitly confirm a patch or remediation status.

CVSS v3.1

Score 4.3medium

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Affected software

Google

Chrome

Affected versions
>=151.0.7922.72 <151.0.7922.72
GitHub Actionsmore threats →ai
chromium/chromium
pkg:github/chromium/chromium
Affected versions
<151.0.7922.72

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/06/2026, 17:16:43 UTC

Technical Analysis

This vulnerability in Google Chrome arises from insufficient enforcement of extension policies before version 151.0.7922.72. An attacker can exploit this by tricking a user into installing a malicious extension, which then bypasses discretionary access control mechanisms via a crafted domain name. The issue is classified under CWE-284 (Improper Access Control). The CVSS vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, no confidentiality impact, low integrity impact, and no availability impact.

Potential Impact

An attacker who successfully convinces a user to install a malicious extension can bypass discretionary access control policies, potentially leading to unauthorized actions or privilege escalation within the browser environment. However, the impact is limited to integrity and does not affect confidentiality or availability. The overall severity is medium based on the CVSS score of 4.3.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users and administrators should monitor the official Google Chrome stable channel update blog for updates regarding this vulnerability. Until a fix is confirmed, avoid installing untrusted extensions and apply standard caution with extension permissions.

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Technical Details

Data Version
5.2
Assigner Short Name
Chrome
Date Reserved
2026-07-27T23:37:11.648Z
State
PUBLISHED
Vendor Advisory Urls
[{"url":"https://chromereleases.googleblog.com/2026/07/stable-channel-update-for-desktop_0887107924.html","vendor":"Google"}]

Threat ID: 6a6aa0ad9c2644c7f849bd25

Added to database: 07/30/2026, 00:54:05 UTC

Last enriched: 08/06/2026, 17:16:43 UTC

Last updated: 09/12/2026, 22:01:31 UTC

Views: 50

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