CVE intelligence

CVE-2026-17739

Vulnerability intelligence

Published Jul 30, 2026Sources checked Sep 12, 2026

4.2MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-17739 and is rated Medium severity with a CVSS score of 4.2. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

CISA KEVNot listedBased on the latest collected catalog

EPSS0.2%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-17739?

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)