RCE in Filerun
CVE-2026-14863
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.025 (84.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.025 · change: +0.009
Affected products
- Filerun — versions 0, 2026.2.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-14863?
- CVE-2026-14863 is a high-severity vulnerability in Filerun, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-08-11.
- How severe is CVE-2026-14863?
- High severity. CVSS v3 base score is 8.8 out of 10.