Out-of-bounds read in Google Chromium - CVE-2026-12026

Vulnerability identifier: #VU134401

CSH Severity: Medium

CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-12026

CWE-ID: CWE-125

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the Video component in Google Chrome. A remote attacker can trick the victim into visiting a specially crafted web page, trigger an out-of-bounds read error and gain access to sensitive information.

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

Install update from vendor's website.

Google Chromium - update to 149.0.7827.114
Google Chrome - update to 149.0.7827.114
chromium - addressed in versions 149.0.7827.114-1.el9, 149.0.7827.114-1.el10_2, 149.0.7827.114-1.el10_3, 149.0.7827.114-1.fc43, 149.0.7827.114-1.fc44
chromium (Debian package) - addressed in versions 149.0.7827.114-1~deb12u1, 149.0.7827.114-1~deb13u1

• https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_01962725236.html
• https://crbug.com/517347084

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