Spoofing attack in Google Chromium - CVE-2026-3942

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Main Vulnerability Database Vulnerabilities #VU123942

Spoofing attack in Google Chromium - CVE-2026-3942

Published: March 12, 2026


Vulnerability identifier: #VU123942
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-2026-3942
CWE-ID: CWE-451
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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.


Affected software

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

How to mitigate CVE-2026-3942

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

External References

Related Security Bulletins