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Vulnerability record · CVE-2026-73693 · published 10 September 2026

CVE-2026-73693: OS command injection vulnerability

FileRun before 2026.3.0 contains an OS command injection vulnerability in the PhotoProofSheet handler that allows authenticated users with upload permission to execute arbitrary commands by uploading files with shell metacharacters in their names. Attackers can upload a file containing command substitution syntax such as backticks, semicolons, or $() sequences in the filename, then trigger the PhotoProofSheet endpoint to execute arbitrary commands as the web-server user due to missing escapeshellarg() sanitization in the ImageMagick montage command construction.

8.7 CVSS 4.0 High EPSS 2.7% · top 14.6% CWE-78 · OS command injection Deferred
8.7CVSS 4.0 base score
2.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
10 Sep 2026Last modified by NVD

Description

FileRun before 2026.3.0 contains an OS command injection vulnerability in the PhotoProofSheet handler that allows authenticated users with upload permission to execute arbitrary commands by uploading files with shell metacharacters in their names. Attackers can upload a file containing command substitution syntax such as backticks, semicolons, or $() sequences in the filename, then trigger the PhotoProofSheet endpoint to execute arbitrary commands as the web-server user due to missing escapeshellarg() sanitization in the ImageMagick montage command construction.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://filerun.com/index.php/changelog?v=2026.3.0
https://vulncheck.com/blog/filerun-delegated-admin-sql-to-object-injection-rce
https://www.vulncheck.com/advisories/filerun-os-command-injection-via-photoproofsheet-handler

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Source: NIST National Vulnerability Database (record CVE-2026-73693), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.