Spoofing attack in Google Chromium - CVE-2026-3927

Vulnerability identifier: #VU123928

CSH Severity: Medium

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-3927

CWE-ID: CWE-451

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a spoofing attack.

The vulnerability exists due to insufficient validation of user-supplied input in PictureInPicture in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into visiting it and spoof web page content.

Google Chromium
Microsoft Edge
Google Chrome
Prisma Access Browser
Debian Linux
Fedora
cef
chromium
chromium (Debian package)

Install update from vendor's website.

Google Chromium - update to 146.0.7680.71
Microsoft Edge - update to 146.0.3856.59
Google Chrome - update to 146.0.7680.71
cef - addressed in versions 146.0.9^chromium146.0.7680.164-1.fc42, 146.0.9^chromium146.0.7680.164-1.fc43, 146.0.9^chromium146.0.7680.164-1.fc44
chromium - addressed in versions 146.0.7680.71-1.el9, 146.0.7680.71-1.el10_1, 146.0.7680.71-1.el10_3, 146.0.7680.71-1.fc42, 146.0.7680.71-1.fc43, 146.0.7680.71-1.fc44, 146.0.7680.80-1.el9
chromium (Debian package) - addressed in versions 146.0.7680.71-1~deb12u1, 146.0.7680.71-1~deb13u1
Prisma Access Browser - update to 146.3.8.76

• https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_10.html
• https://crbug.com/474948986

• Multiple vulnerabilities in Google Chrome
• Debian update for chromium
• Fedora 44 update for chromium
• Fedora 43 update for chromium
• Fedora EPEL 10.3 update for chromium
• Fedora EPEL 10.1 update for chromium
• Fedora 42 update for chromium
• Multiple vulnerabilities in Microsoft Edge
• Fedora EPEL 9 update for chromium
• Fedora EPEL 9 update for chromium
• Fedora 44 update for cef
• Fedora 43 update for cef
• Fedora 42 update for cef
• Multiple vulnerabilities in Prisma Access Browser