CVE intelligence

CVE-2026-87603

Vulnerability intelligence

Published Sep 9, 2026Sources checked Sep 27, 2026

6.5MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-87603 and is rated Medium severity with a CVSS score of 6.5. 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

EPSS0.3%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-87603?

Missing authorization in FileSystem in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass system access restrictions via a crafted HTML page. (Chromium security severity: Medium)