CVE-2026-73693 FileRun < 2026.3.0 OS Command Injection via PhotoProofSheet Handler
Authenticated users can execute arbitrary OS commands via malicious filenames in FileRun due to missing input sanitization in the PhotoProofSheet handler.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-73693?
CVE-2026-73693 is a high-severity command injection vulnerability in FileRun, published on 10 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
FileRun before 2026.3.0 contains an OS command injection vulnerability in the PhotoProofSheet handler that allows authenticated users with upload permission to execute arbitrary commands by uploading files with shell metacharacters in their names. Attackers can upload a file containing command substitution syntax such as backticks, semicolons, or $() sequences in the filename, then trigger the PhotoProofSheet endpoint to execute arbitrary commands as the web-server user due to missing escapeshellarg() sanitization in the ImageMagick montage command construction.
Weakness: CWE-78
Which versions are affected by CVE-2026-73693?
How do I fix CVE-2026-73693?
No fix has been published for CVE-2026-73693 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-2026-73693 being exploited?
There is no known exploitation of CVE-2026-73693 in the wild and no public exploit code.
Sources
Also known as GHSA-63rx-6h5r-6rfp.