Improper Authorization in Google Chromium - CVE-2026-79222

Vulnerability identifier: #VU145474

CSH Severity: Medium

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-79222

CWE-ID: CWE-285

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to bypass authorization checks.

The vulnerability exists due to improper access control in CustomTabs when handling requests. A remote attacker can send a specially crafted request to bypass authorization checks.

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

Install security update from vendor's website.

Google Chromium - update to 152.0.7977.64
Google Chrome - addressed in versions 151.0.7922.175, 152.0.7977.64
chromium (Debian package) - update to 152.0.7977.75-1~deb13u1
chromium - addressed in versions 154.0.8037.57-1.el9, 154.0.8037.57-1.el10_3, 154.0.8037.57-1.el10_4, 154.0.8037.57-1.fc43, 154.0.8037.57-1.fc44, 154.0.8037.57-1.fc45

• https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html
• https://crbug.com/496195129

• Multiple vulnerabilities in Google Chrome
• Debian update for chromium
• Fedora EPEL 10.3 update for chromium
• Fedora EPEL 9 update for chromium
• Fedora 45 update for chromium
• Fedora 44 update for chromium
• Fedora EPEL 10.4 update for chromium
• Fedora 43 update for chromium