CVE-2026-73699: Filerun

High severity, CVSS 7.2. EPSS: 0.8% chance of exploitation in the next 30 days.

FileRun before 2026.3.0 contains a PHP object injection vulnerability that allows authenticated attackers to execute arbitrary code by exploiting incorrect options passed to unserialize() in the Perms::getPerms() method, where a positional array is used instead of the required named-key array to disable class instantiation. Attackers with database write access can inject a serialized gadget chain into the permissions table columns processed on every authenticated page load to write arbitrary files, such as PHP webshells, to web-accessible paths.

Affected products

• Filerun Filerun: before 2026.3.0 (fixed in 2026.3.0)

Published 2026-09-10. Last modified 2026-09-10.