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CVE-2026-54134GHSA-J4H9-PM27-4RFWPYSEC-2026-2687

OctoPrint: File exfiltration possible via query parameters on upload endpoints

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 1.11.8, 2.0.0rc3
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: total

Summary

OctoPrint provides a web interface for controlling consumer 3D printers. Prior to 1.11.8 and 2.0.0rc3, OctoPrint's custom Tornado upload handler and Flask with Werkzeug parse request parameters differently, allowing an attacker with FILE_UPLOAD permission to inject reserved internal upload fields through query parameters or parser differentials despite the earlier GHSA-m9jh-jf9h-x3h2 fix. The affected endpoints are /api/files/{local|sdcard}, /api/languages, /plugin/backup/restore, and /plugin/pluginmanager/upload_file. An attacker can make OctoPrint treat an arbitrary host file as a temporary upload, move it into a downloadable upload directory, disclose configuration secrets or other readable files, and remove runtime files in a way that can affect a later restart. This issue is fixed in versions 1.11.8 and 2.0.0rc3.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: total

  3. Record last updated

Affected versions

  • OctoPrint OctoPrint

    fixed in 1.11.8; From 2.0.0rc1 · fixed in 2.0.0rc3

  • octoprintPyPI

    fixed in 1.11.8

  • octoprintPyPI

    From 2.0.0rc1 · fixed in 2.0.0rc3

  • octoprintPyPI

    fixed in 1.11.8; From 2.0.0rc1 · fixed in 2.0.0rc3

References 5

GitHub · OctoPrint/OctoPrint