CVE-2026-14863 FileRun 2026.2.0 RCE via Thumbnail Generation Command Injection
Authenticated attackers can execute arbitrary commands by uploading files with malicious filenames that trigger command injection during thumbnail generation.
- 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-2026-14863?
CVE-2026-14863 is a high-severity command injection vulnerability in FileRun, published on 11 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
FileRun up to and including version 2026.2.0 contains an OS command injection vulnerability that allows authenticated attackers to achieve remote code execution by uploading a file with a malicious filename containing shell command substitution sequences. The thumbnail generation system passes filenames wrapped in shell double-quotes directly to exec() without escapeshellarg() sanitization, allowing filenames such as $(PAYLOAD).mp4 to survive the filename sanitizer and be evaluated as shell commands when ffmpeg, ImageMagick, vips, or stl-thumb processes the file during thumbnail generation.
Weakness: CWE-78
Which versions are affected by CVE-2026-14863?
How do I fix CVE-2026-14863?
No fix has been published for CVE-2026-14863 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-2026-14863 being exploited?
There is no known exploitation of CVE-2026-14863 in the wild and no public exploit code.
Sources
Also known as GHSA-mcfq-hmcc-5pch.