Overview
What is CVE-2026-87561?
Incorrect authorization in Web Authentication in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass web origin policy via a crafted Chrome extension. (Chromium security severity: Low)
CVE intelligence
CVE-2026-87561
Vulnerability intelligence
4.3MEDIUMCVSS out of 10
What this means
Review the available evidence
CVE-2026-87561 and is rated Medium severity with a CVSS score of 4.3. 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