CVE-2026-73694 FileRun < 2026.3.0 OS Command Injection via escapeshellcmd() No-Op Redefinition
Attackers can execute arbitrary OS commands in FileRun via unsanitized input in image preview or thumbnail generation features.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-73694?
CVE-2026-73694 is a high-severity command injection vulnerability in FileRun, published on 10 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
FileRun before 2026.3.0 contains an OS command injection vulnerability caused by a no-op redefinition of escapeshellcmd() in CLI.php that strips shell-metacharacter escaping, allowing attacker-controlled input to reach an exec() sink unsanitized. Attackers can exploit this through an interactive path via image_preview.php with a crafted args parameter requiring superuser authentication, or through a persistent path by storing malicious payloads in thumbnails_ffmpeg_args or thumbnails_ffmpeg_ss that execute when any user triggers video thumbnail generation.
Weakness: CWE-78
Which versions are affected by CVE-2026-73694?
How do I fix CVE-2026-73694?
No fix has been published for CVE-2026-73694 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-73694 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73694 exists.
Sources
Also known as GHSA-5wmm-f68q-g9pg.