Use-after-free in Google Chromium - CVE-2026-12439

Vulnerability identifier: #VU134692

CSH Severity: High

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-2026-12439

CWE-ID: CWE-416

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error within the Digital Credentials component in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger use-after-free error and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Google Chromium
Microsoft Edge
Google Chrome
Debian Linux
Fedora
Chrome OS
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
Chrome OS - update to 144.0.7559.256
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/519728275

• 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 Google ChromeOS LTS
• Multiple vulnerabilities in Microsoft Edge