Improper validation of generative ai output in Google Chromium - CVE-2025-13720

Vulnerability identifier: #VU119049

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-13720

CWE-ID: CWE-1426

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The vulnerability exists due to a bad cast in Loader. A remote attacker can bypass implemented security restrictions. 

Google Chromium
Microsoft Edge
Google Chrome
Prisma Access Browser
Debian Linux
Chrome OS
chromium (Debian package)

Install update from vendor's repository.

Google Chromium - update to 143.0.7499.40
Microsoft Edge - update to 143.0.3650.66
Google Chrome - update to 143.0.7499.40
Chrome OS - update to 138.0.7204.300
chromium (Debian package) - addressed in versions 143.0.7499.40-1~deb12u1, 143.0.7499.40-1~deb13u1
Prisma Access Browser - update to 143.37.2.193

• https://chromereleases.googleblog.com/2025/12/stable-channel-update-for-desktop.html
• https://crbug.com/457818670

• Multiple vulnerabilities in Google Chrome
• Debian update for chromium
• Multiple vulnerabilities in Microsoft Edge
• Multiple vulnerabilities in Google ChromeOS LTS
• Multiple vulnerabilities in Prisma Access Browser