Unintended Proxy or Intermediary in Google Chromium - CVE-2026-87502
Published: September 9, 2026
Vulnerability identifier: #VU148676
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-87502
CWE-ID: CWE-441
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause the browser to perform unauthorized actions.
The vulnerability exists due to a confused deputy condition in the Fullscreen feature when handling fullscreen requests. A remote attacker can trick a victim into interacting with fullscreen content to cause the browser to perform unauthorized actions.
Affected software
Google Chromium
Google Chrome
Google Chrome
How to mitigate CVE-2026-87502
Install security update from vendor's website.
Google Chromium - update to 153.0.8010.36
Google Chrome - update to 153.0.8010.36
Google Chrome - update to 153.0.8010.36