Input validation error in Google Chromium - CVE-2026-11259

Vulnerability identifier: #VU133852

CSH Severity: Low

CVSS v4: 1.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-11259

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain access to crash the browser.

The vulnerability exists due to a improper input validation in Cast in Google Chrome. A remote attacker can trick the victim to perform certain actions in browser and crash it.

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

Install update from vendor's website.

Google Chromium - update to 149.0.7827.53
Microsoft Edge - update to 149.0.4022.52
Google Chrome - update to 149.0.7827.53
chromium (Debian package) - addressed in versions 149.0.7827.53-1~deb12u1, 149.0.7827.53-1~deb13u1

• https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html
• https://crbug.com/499215943

• Debian update for chromium
• Multiple vulnerabilities in Google Chrome
• Multiple vulnerabilities in Microsoft Edge