Improperly implemented security check for standard in Google Chromium - CVE-2026-16421

Vulnerability identifier: #VU139058

CSH Severity: Medium

CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-16421

CWE-ID: CWE-358

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to incorrect implementation in WebAudio 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
Google Chrome
Prisma Access Browser
Debian Linux
chromium (Debian package)

Install update from vendor's website.

Google Chromium - update to 150.0.7871.181
Microsoft Edge - update to 150.0.4078.96
Google Chrome - update to 150.0.7871.181
chromium (Debian package) - update to 150.0.7871.181-1~deb13u1
Prisma Access Browser - update to 150.49.8.187

• https://chromereleases.googleblog.com/2026/07/stable-channel-update-for-desktop_0256605430.html
• https://crbug.com/528276487

• Multiple vulnerabilities in Google Chrome
• Debian update for chromium
• Multiple vulnerabilities in Microsoft Edge
• Multiple vulnerabilities in Prisma Access Browser (August 2026)