Permissions, Privileges, and Access Controls in Google Chromium - CVE-2026-12027

Vulnerability identifier: #VU134402

CSH Severity: High

CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-12027

CWE-ID: CWE-264

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient policy enforcement in Headless in Google Chrome. A remote attacker can trick the victim to visit a specially crafted website, bypass implemented security measures and compromise the affected system.

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/517517155

• 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