CVE-2026-87551: Medium severity Google Google Chrome vulnerability
Chromium CVE-2026-87551: Improper certificate validation in CORS
Other sources
Improper certificate validation in CORS in Google Chrome prior to 153.0.8010.36 allowed a remote attacker leveraging social engineering to bypass web origin policy via crafted network traffic. (Chromium security severity: Low)
— MITRE
This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 153.0.4234.32 - Upgrade
Upgrade
Chromium-based (Google Chrome / Microsoft Edge)to a version that resolves this vulnerability.Fixed in 153.0.8010.36
Event History
Frequently Asked Questions
Which Chrome versions need to be remediated?
Google Chrome versions prior to 153.0.8010.36 are affected. Updating to 153.0.8010.36 or later addresses the issue.
What would an attacker need to exploit this issue?
The attacker is remote and must leverage social engineering and crafted network traffic. The issue could allow bypass of the web origin policy through improper certificate validation in CORS.