Improperly implemented security check for standard in Google Chromium - CVE-2026-9999

Vulnerability identifier: #VU132910

CSH Severity: Medium

CVSS v4: 7.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-9999

CWE-ID: CWE-358

Exploitation vector: Remote access

Exploit availability: Public exploit is available

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to incorrect implementation in ANGLE in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into visiting it and compromise the system.

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

Install update from vendor's website.

Google Chromium - update to 148.0.7778.215
Microsoft Edge - update to 148.0.3967.96
chromium - addressed in versions 148.0.7778.215-1.el9, 148.0.7778.215-1.el10_2, 148.0.7778.215-1.el10_3, 148.0.7778.215-1.fc43, 148.0.7778.215-1.fc44
chromium (Debian package) - addressed in versions 148.0.7778.215-1~deb12u1, 148.0.7778.215-1~deb13u1

• Exploit #12924 - CVE-2026-9999-exploit () (August 14, 2026)

• https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
• https://crbug.com/513364480

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