Input validation error in Google Chromium - CVE-2026-12465

Vulnerability identifier: #VU134718

CSH Severity: High

CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-12465

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation in Metrics component in Google Chrome. A remote attacker can trick the victim to open a specially crafted web page and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

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

Install update from vendor's website.

Google Chromium - update to 149.0.7827.155
Microsoft Edge - update to 149.0.4022.80
Google Chrome - update to 149.0.7827.155
chromium - addressed in versions 149.0.7827.155-1.el9, 149.0.7827.155-1.el10_2, 149.0.7827.155-1.el10_3, 149.0.7827.155-1.fc43, 149.0.7827.155-1.fc44
chromium (Debian package) - addressed in versions 149.0.7827.155-1~deb12u1, 149.0.7827.155-1~deb13u1

• https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_01750511403.html
• https://crbug.com/520189702

• Multiple vulnerabilities in Google Chrome
• Fedora 43 update for chromium
• Fedora 44 update for chromium
• Debian update for chromium
• Fedora EPEL 10.3 update for chromium
• Fedora EPEL 10.2 update for chromium
• Fedora EPEL 9 update for chromium
• Multiple vulnerabilities in Microsoft Edge