CVE-2026-93378: Low severity Google Chrome vulnerability
Chromium CVE-2026-93378: Missing authorization in Storage
Other sources
Missing authorization in Storage in Google Chrome prior to 153.0.8010.52 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted PDF file. (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 153.0.4234.48 - Upgrade
Upgrade
Google Chrometo a version that resolves this vulnerability.Fixed in 153.0.8010.52
Event History
Frequently Asked Questions
What access does an attacker need before this issue can be exploited?
The attacker must already have compromised the Chrome renderer process. The bypass is then triggered using a crafted PDF file.
What is the security impact after exploitation?
A compromised renderer can bypass Chrome site isolation, weakening the isolation boundary between sites.
Which Chrome versions are affected?
Google Chrome versions prior to 153.0.8010.52 are affected.