CVE intelligence

CVE-2026-9979

Vulnerability intelligence

Published May 28, 2026Sources checked Sep 27, 2026

5.0MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-9979 and is rated Medium severity with a CVSS score of 5.0. 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-2026-9979?

Insufficient validation of untrusted input in Input in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: High)