CVE-2026-87606: High severity Google Google Chrome vulnerability
Chromium CVE-2026-87606: Missing authorization in SiteIsolation
Other sources
Missing authorization in SiteIsolation in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: Medium)
— 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 (Google Chrome / Chromium-based Edge)to a version that resolves this vulnerability.Fixed in 153.0.8010.36
Event History
Frequently Asked Questions
What must an attacker achieve before exploiting this issue?
The attacker must already have compromised the Chrome renderer process. The bypass is then triggered using a crafted HTML page.
Which Chrome versions are affected?
Google Chrome versions prior to 153.0.8010.36 are affected.
What security boundary can be bypassed?
A compromised renderer can bypass Chrome's site isolation protections.