Incorrect authorization in Google Chromium - CVE-2026-87570
Published: September 9, 2026
Vulnerability identifier: #VU148613
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-87570
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to access resources without proper authorization.
The vulnerability exists due to incorrect authorization in SiteIsolation when processing web content. A remote attacker can cause SiteIsolation to incorrectly authorize access to resources.
Affected software
Google Chromium
Microsoft Edge
Google Chrome
Debian Linux
chromium (Debian package)
Microsoft Edge
Google Chrome
Debian Linux
chromium (Debian package)
How to mitigate CVE-2026-87570
Install security update from vendor's website.
Google Chromium - update to 153.0.8010.36
Microsoft Edge - update to 153.0.4234.32
Google Chrome - update to 153.0.8010.36
chromium (Debian package) - update to 153.0.8010.47-2~deb13u1
Microsoft Edge - update to 153.0.4234.32
Google Chrome - update to 153.0.8010.36
chromium (Debian package) - update to 153.0.8010.47-2~deb13u1