Main Vulnerability Database Vulnerabilities #VU145485

Externally Controlled Reference to a Resource in Another Sphere in Google Chromium - CVE-2026-78966

Published: August 26, 2026

Vulnerability identifier: #VU145485

CSH Severity: High

CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-78966

CWE-ID: CWE-610

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to an externally controlled reference in QUIC when processing network input. A remote attacker can cause the browser to process crafted QUIC data to execute arbitrary code.

User interaction is required.

Affected software

Google Chromium
Google Chrome

How to mitigate CVE-2026-78966

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

External References

Related Security Bulletins