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 inject arbitrary scripts or HTML (UXSS) via a crafted Chrome Extension. (Chromium security severity: Medium)
Published: 2026-07-30
Score: 4.2 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

Insufficient policy enforcement in Chrome extensions allows an attacker who persuades a user to install a malicious extension to inject arbitrary scripts or HTML (UXSS) through a crafted Chrome Extension. This flaw can result in the execution of arbitrary code in the context of the browser and may compromise the confidentiality and integrity of the user's data.

Affected Systems

Google Chrome installers before version 151.0.7922.72 are affected. The issue applies to all operating systems supported by Chrome where the user has installed extensions.

Risk and Exploitability

The CVSS score of 4.2 indicates a medium impact, and the EPSS score of less than 1% suggests a low probability of exploitation at present. The vulnerability requires user interaction and social engineering to convince a victim to install a malicious extension, so it is not a remote attack vector. The flaw is not listed in the CISA KEV catalog.

Generated by OpenCVE AI on August 3, 2026 at 12:20 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade Google Chrome to version 151.0.7922.72 or newer.
  • Remove or disable any extensions that were installed before the upgrade and are no longer trusted.
  • Instruct users to install extensions only from the official Chrome Web Store and verify the publisher’s information.

Generated by OpenCVE AI on August 3, 2026 at 12:20 UTC.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
Debian DLA Debian DLA DLA-4710-1 chromium security update
Debian DSA Debian DSA DSA-6408-1 chromium security update
History

Fri, 31 Jul 2026 00:15:00 +0000

Type Values Removed Values Added
Title chromium-browser: chromium-browser: Insufficient policy enforcement in Extensions
References
Metrics threat_severity

None

 threat_severity

Moderate

Thu, 30 Jul 2026 19:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-79
Metrics cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 30 Jul 2026 04:30:00 +0000

Type Values Removed Values Added
First Time appeared Google
Google chrome
Vendors & Products Google
Google chrome

Thu, 30 Jul 2026 01:00:00 +0000

Type Values Removed Values Added
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 inject arbitrary scripts or HTML (UXSS) via a crafted Chrome Extension. (Chromium security severity: Medium)
References

Subscriptions

Google Chrome
cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published:

Updated: 2026-07-30T18:44:08.760Z

Reserved: 2026-07-27T23:34:34.819Z

Link: CVE-2026-17739

cve-icon Vulnrichment

Updated: 2026-07-30T18:44:01.991Z

cve-icon NVD

Status : Analyzed

Published: 2026-07-30T01:16:36.717

Modified: 2026-08-03T17:45:21.783

Link: CVE-2026-17739

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-07-30T00:19:08Z

Links: CVE-2026-17739 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-03T12:30:17Z

Weaknesses
  • CWE-79

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')