SB2026110377 - Incorrect comparison in ZoneMinder

Description

This security bulletin contains information about 1 vulnerability.

1) Incorrect comparison (CVE-ID: CVE-2026-104198)

CWE-ID: CWE-697 - Incorrect Comparison

CVSSv4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to bypass authentication, disclose sensitive information, potentially make unauthorized state changes, and cause a denial of service in the ZoneMinder web panel.

The vulnerability exists due to an incorrect authentication-state comparison in web/includes/auth.php and web/index.php when processing an invalid token parameter. Failed token validation sets $user to boolean false, but isset($user) still returns true, causing the authentication gate to be skipped. A remote attacker can send a request such as index.php?token=invalid_signature_test to access protected views, potentially trigger actions without secondary authorization checks, and cause fatal PHP errors when subsequent code treats $user as an object.

Remediation

Install update from vendor's website.

References

• https://github.com/ZoneMinder/zoneminder/security/advisories/GHSA-23fj-frfw-hmcr
• https://github.com/ZoneMinder/zoneminder/commit/144a04ca4