Improperly implemented security check for standard in Google Chromium - CVE-2026-8565

Vulnerability identifier: #VU131521

CSH Severity: High

CVSS v4: 7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-8565

CWE-ID: CWE-358

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to incorrect implementation in Downloads in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into visiting it and gain access to sensitive information.

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

Install update from vendor's website.

Google Chromium - update to 148.0.7778.167
Microsoft Edge - update to 148.0.3967.70
Google Chrome - update to 148.0.7778.167
chromium - addressed in versions 148.0.7778.167-1.el9, 148.0.7778.167-1.el10_1, 148.0.7778.167-1.el10_2, 148.0.7778.167-1.el10_3, 148.0.7778.167-1.fc42, 148.0.7778.167-1.fc43, 148.0.7778.167-1.fc44, 148.0.7778.178-1.fc42, 148.0.7778.178-1.fc43
chromium (Debian package) - addressed in versions 148.0.7778.167-1~deb12u1, 148.0.7778.167-1~deb13u1

• https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html
• https://crbug.com/442860473

• Multiple vulnerabilities in Google Chrome
• Debian update for chromium
• Fedora 42 update for chromium
• Fedora 43 update for chromium
• Fedora 44 update for chromium
• Fedora EPEL 10.2 update for chromium
• Fedora EPEL 10.3 update for chromium
• Fedora EPEL 10.1 update for chromium
• Fedora EPEL 9 update for chromium
• Multiple vulnerabilities in Microsoft Edge
• Fedora 42 update for chromium
• Fedora 43 update for chromium