OS Command Injection Vulnerability in FileRun by FileRun Inc.
CVE-2026-73693

8.7HIGH

Key Information:

Vendor

Filerun

Status
Filerun
Vendor
CVE Published:
10 September 2026

Badges

👾 Exploit Exists

What is CVE-2026-73693?

FileRun versions prior to 2026.3.0 are vulnerable to an OS command injection flaw found in the PhotoProofSheet handler. Authenticated users with file upload permissions can exploit this vulnerability by uploading files whose names contain shell metacharacters. This allows them to execute arbitrary commands via the web server due to inadequate input sanitization in the ImageMagick montage command construction. Attackers can leverage command substitution syntax, including backticks and semicolons, to gain control over the affected system, making it imperative for users to update to the latest version.

Affected Version(s)

FileRun 0 < 2026.3.0

References

https://vulncheck.com/blog/filerun-delegated-admin-sql-to...
technical-descriptionexploit
https://filerun.com/index.php/changelog?v=2026.3.0
release-notespatch
https://www.vulncheck.com/advisories/filerun-os-command-i...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Valentin Lobstein (Chocapikk)
VulnCheck
.