CVE-2026-106405 and is rated Medium severity with a CVSS score of 6.0. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
What to do next
Remediation and response
Microsoft Security Response Center guidance
Vendor revision: Oct 26, 2026
Release Notes
Vendor-listed releases
155.0.4283.48
CISA KEVNot listedBased on the latest collected catalog
EPSS0.1%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview
What is CVE-2026-106405?
Race condition in CustomTabs in Google Chrome on on Android prior to 155.0.8059.39 allowed a local attacker to bypass web origin policy via a co-installed app. (Chromium security severity: Medium)