Vulnerability · Published Aug 11, 2026 · Assigned by VulnCheck

CVE-2026-14863FileRun 2026.2.0 RCE via Thumbnail Generation Command Injection

High 8.8

In plain English

A high-severity OS command injection in FileRun from FileRun. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.5% (higher than 85% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)2.5%top 15.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
FileRun	FileRun	0 – through 2026.2.0

Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Vendor product
Patch Version patch
https://www.vulncheck.com/advisories/filerun-rce-via-thumbnail-generation-command-injection third-party-advisory
Blog Post