# CVE-2026-73694: FileRun OS command injection in CLI.php escapeshellcmd redefinition

Source: https://junglewise.ai/threats/cve-2026-73694-filerun-os-command-injection-in-cli-php-escapeshellcmd  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-10. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-73694 · Severity: high · CVSS 7.2 · Published 2026-09-10

FileRun is a self-hosted file manager and sharing platform. A critical vulnerability in how FileRun handles shell command escaping allows attackers to inject arbitrary OS commands, potentially leading to full server compromise. Superuser-level attackers can exploit this directly through settings endpoints, while other attackers can store malicious payloads that execute when video thumbnails are generated, affecting all users.

Technologies: [FileRun](https://junglewise.ai/threats/technologies/filerun). Vendors: [FileRun](https://junglewise.ai/threats/vendors/filerun).

## Quick answers

**Is CVE-2026-73694 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-73694 being exploited in the wild.

**How severe is CVE-2026-73694?** High severity, with a CVSS score of 7.2, published 10 September 2026.

**Which products and versions are affected?** FileRun before 2026.3.0.

**Is there a fix for CVE-2026-73694?** A patch was published on 2026-09-06: Fixed in FileRun 2026.3.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-73694 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-73694?** Check whether you run FileRun at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

FileRun redefines PHP's escapeshellcmd() function as a no-op in CLI.php, effectively disabling shell metacharacter escaping. This allows attacker-controlled input to reach exec() sinks unsanitized. The vulnerability can be exploited through two paths: (1) an interactive attack via image_preview.php with a crafted args parameter, requiring superuser authentication, or (2) a persistent attack by injecting malicious payloads into thumbnails_ffmpeg_args or thumbnails_ffmpeg_ss configuration fields, which then execute when any user triggers video thumbnail generation. The root cause is the neutralization of a critical security function that should prevent shell injection. FileRun 2026.3.0 patches this vulnerability; versions before 2026.3.0 are affected.

## Affected products

- FileRun FileRun before 2026.3.0

## Timeline

- 2026-09-10: disclosed
- 2026-09-06: patched: Fixed in FileRun 2026.3.0

## References

- [https://filerun.com/index.php/changelog?v=2026.3.0](https://filerun.com/index.php/changelog?v=2026.3.0)
- [https://vulncheck.com/blog/filerun-delegated-admin-sql-to-object-injection-rce](https://vulncheck.com/blog/filerun-delegated-admin-sql-to-object-injection-rce)

## Related threats

- [FileRun PHP object injection in permission deserialization](https://junglewise.ai/threats/cve-2026-73699-filerun-php-object-injection-in-permission-deserialization)
- [FileRun SQL injection in admin description field](https://junglewise.ai/threats/cve-2026-73698-filerun-sql-injection-in-admin-description-field)
- [FileRun OS command injection in PhotoProofSheet handler](https://junglewise.ai/threats/cve-2026-73693-filerun-os-command-injection-in-photoproofsheet-handler)