CVE-2026-54134
HighCVSS 7.0Exploitation Probability (EPSS)
Low risk24th percentile - higher than 24% of all known CVEs
Summary
OctoPrint before versions 1.11.8 and 2.0.0rc3 has a parsing discrepancy between its custom Tornado upload handler and Flask/Werkzeug, allowing an attacker with FILE_UPLOAD permission to inject reserved internal upload fields via query parameters or parser differentials. Affected endpoints include /api/files/{local|sdcard}, /api/languages, /plugin/backup/restore, and /plugin/pluginmanager/upload_file.
Risk Assessment
An attacker can make OctoPrint treat an arbitrary host file as a temporary upload, move it into a downloadable directory, disclose configuration secrets or other readable files, and remove runtime files affecting later restarts.
Recommendation
Upgrade OctoPrint to version 1.11.8 or 2.0.0rc3, which include the fix.
Other vulnerabilities in OctoPrint
See all- CVE-2025-58180High
OctoPrint provides a web interface for controlling consumer 3D printers. OctoPrint versions up until and including 1.11.2 contain a vulnerability that allows an authenticated attacker to upload a file under a specially crafted filename that will allow arbitrary command execution if said filename becomes included in a command defined in a system event handler and said event gets triggered. If no event handlers executing system commands with uploaded filenames as parameters have been configured, this vulnerability does not have an impact. The vulnerability is patched in version 1.11.3.
- CVE-2026-35163Medium
OctoPrint prior to 1.11.8 and 2.0.0rc3, Suppressed Command notification popups use PNotify rendering for printer-controlled payload.command and payload.message values in src/octoprint/static/js/app/viewmodels/terminal.js without HTML escaping. An attacker who convinces a victim to print a crafted file can inject HTML and JavaScript into the notification, disrupt prints, read information available to the victim including sensitive settings when permitted, or perform actions in the victim's OctoPrint session.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS