Answer in brief
CVE-2026-54134 records a High severity (CVSS 7.0) vulnerability in OctoPrint: File exfiltration possible via query parameters on upload endpoints. The current sources do not mark it as known exploited. The current feed maps OctoPrint/OctoPrint (generic), OctoPrint (pip), OctoPrint (pip), octoprint (pypi) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps OctoPrint/OctoPrint (generic), OctoPrint (pip), OctoPrint (pip), octoprint (pypi) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| OctoPrint/OctoPrintgeneric | < 1.11.8 || >= 2.0.0rc1, < 2.0.0rc3 | Not reported |
| OctoPrintpip | <=1.11.7 | 1.11.8 |
| OctoPrintpip | >=2.0.0rc1,<=2.0.0rc2 | 2.0.0rc3 |
| octoprintpypi | >=0 <1.11.8 | 1.11.8 |
| octoprintpypi | >=2.0.0rc1 <2.0.0rc3 | 2.0.0rc3 |
Published upstream
Aug 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 23, 2026
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.
Quoted source text, attributed separately from HOL analysis.