Vulnerability · Published Sep 10, 2026 · Assigned by VulnCheck

CVE-2026-73699FileRun < 2026.3.0 PHP Object Injection via Perms::getPerms()

High 7.2

In plain English

A high-severity unsafe deserialization in FileRun from FileRun. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)0.8%top 43.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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 (as reported)

Vendor	Product	Versions
FileRun	FileRun	0 – before 2026.3.0

Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

VulnCheck Blog technical-description, exploit
Release Notes release-notes, patch
https://www.vulncheck.com/advisories/filerun-php-object-injection-via-perms-getperms third-party-advisory