CVE-2026-17976: Policy bypass in Google Chrome
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.
AI Analysis
Technical Summary
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.
CVE-2026-17976: Policy bypass in Google 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
Affected software
Chrome
pkg:github/chromium/chromiumRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
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.
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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