CVE-2026-9903

Insufficient validation of untrusted input in Site Isolation in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted MHTML page. (Chromium security severity: High)

More information : https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html