CVE-2026-34733 WWBN CVE debrief

Who should care

System administrators and users of AVideo, especially those using version 26.0 or prior, should be aware of this vulnerability and take necessary actions to secure their installations. This includes reviewing system logs, restricting access to the deleteSystemdPrivate.php script, and implementing additional security measures to prevent unauthorized access.

Technical summary

The AVideo installation script's deleteSystemdPrivate.php file contains a PHP operator precedence bug in its CLI-only access guard. The guard condition !php_sapi_name() === 'cli' never evaluates to true due to how PHP resolves operator precedence. This allows the script to be accessed via HTTP without authentication, leading to potential file deletion and disclosure of temp directory contents. The bug was introduced in version 26.0 and prior. The script is intended to run exclusively from the command line.

Defensive priority

Medium priority should be given to patching or mitigating this vulnerability, as it could lead to unauthorized access and potential data loss.

Recommended defensive actions

• Apply the patch or upgrade to a version of AVideo that is not vulnerable.
• Restrict access to the deleteSystemdPrivate.php script.
• Monitor the server's temp directory for any suspicious activity.
• Implement additional security measures to prevent unauthorized access.
• Review system logs for evidence of exploitation.
• Perform a thorough review of the AVideo installation and configuration.
• Consider implementing compensating controls for exposed systems.

Evidence notes

The CVE record was published on 2026-03-31T21:16:32.083Z and last modified on 2026-07-24T20:10:00.147Z. The NVD entry is currently Analyzed. The vulnerability affects AVideo installations prior to version 26.0.1. Evidence of exploitation has not been reported. Defenders should verify AVideo installations and review system logs for suspicious activity related to the deleteSystemdPrivate.php script.

Official resources