CVE-2026-14863
FileRun 2026.2.0 RCE via Thumbnail Generation Command Injection
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-78 |
| Vendor | filerun |
| Product | filerun |
| Published | Aug 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
FileRun / FileRun
0 ≤ 2026.2.0
References
Credits
Valentin Lobstein (Chocapikk)