What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-11 · updated 2026-09-16
• Weakness: CWE-78

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

• FileRun: through 2026.2.0

References

• https://filerun.com/
• https://filerun.com/index.php/changelog?v=2026.2.1
• https://www.vulncheck.com/advisories/filerun-rce-via-thumbnail-generation-command-injection
• https://www.vulncheck.com/blog/filerun-thumbnail-command-injection-rce

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