Main Vulnerability Database Vulnerabilities #VU159018

Improper Authorization in Google Chromium - CVE-2026-121107

Published: November 4, 2026

Vulnerability identifier: #VU159018

CSH Severity: Medium

CVSS v4: 7.4 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-121107

CWE-ID: CWE-285

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to incorrect authorization in BackgroundFetch in Google Chrome. A remote attacker can trick the victim to visit a specially crafted website, bypass implemented security measures and execute arbitrary code.

Affected software

Google Chromium
Google Chrome

How to mitigate CVE-2026-121107

Install update from vendor's website.

Google Chromium - update to 157.0.8103.38
Google Chrome - update to 157.0.8103.38

External References

Related Security Bulletins