Answer in brief
CVE-2026-54134 records a High severity 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). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. 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). 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 |
Published upstream
Aug 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 21, 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.