Buffer overflow in Google Chromium - CVE-2026-11645

Vulnerability identifier: #VU133930

CSH Severity: Critical

CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-11645

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: The vulnerability is being exploited in the wild

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to a boundary error in V8 engine in Google Chrome. A remote attacker can trick the victim to visit a specially crafted webpage, trigger a stack-based buffer overflow and execute arbitrary code on the system.

Note, the vulnerability is being actively exploited in the wild.

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

Install update from vendor's website.

Google Chromium - update to 149.0.7827.102
Microsoft Edge - update to 149.0.4022.62
Google Chrome - update to 149.0.7827.102
chromium - addressed in versions 149.0.7827.102-1.el9, 149.0.7827.102-1.el10_2, 149.0.7827.102-1.el10_3, 149.0.7827.102-1.fc43, 149.0.7827.102-1.fc44
chromium (Debian package) - addressed in versions 149.0.7827.102-1~deb12u1, 149.0.7827.102-1~deb13u1

• https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0153744567.html
• https://crbug.com/506689381

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