CVE-2026-73699 Details
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.
A PHP object injection vulnerability has been identified in FileRun versions prior to 2026.3.0. This vulnerability allows authenticated attackers to execute arbitrary code by exploiting incorrect options passed to the unserialize() function in the Perms::getPerms() method. The vulnerability arises because 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, which are processed on every authenticated page load. This injection can be used to write arbitrary files, such as PHP web shells, to web-accessible paths.
Users are advised to upgrade to FileRun version 2026.3.0 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 10, 2026CISA-ADP
Assessed Sep 10, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://filerun.com/index.php/changelog?v=2026.3.0 | [email protected] | Release NotesVendor |
| https://vulncheck.com/blog/filerun-delegated-admin-sql-to-object-injection-rce | [email protected] | BundleExploitRemedyTechnical Analysis |
| https://www.vulncheck.com/advisories/filerun-php-object-injection-via-perms-getperms | [email protected] | Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-502 | Deserialization of Untrusted Data | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| FileRun | < 2026.3.0 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 10, 2026 | CVE Modified | CISA-ADP |
| Sep 10, 2026 | New CVE Received | [email protected] |