CVE-2026-118333 — Google CHROME
CRITICALCVE-2026-118333 is a critical-severity (CVSS 9.3) CWE-862 vulnerability in google chrome. A fix is available — see the affected versions and patch details below.
Missing authorization in Video in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: High)
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-118333.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Description
Missing authorization in Video in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: High)
Affected Products
chromegoogleDetection & mitigation playbook
Vendor / applianceDetect
Inventory every google chrome deployment and check each version against the affected-products list above.
Fix
Apply the google chrome security patch or hotfix for CVE-2026-118333 on the affected version, following the vendor advisory for your exact build.
Workarounds
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2026-118333 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.