---
cve: "CVE-2026-54134"
severity: "HIGH"
cvss: 7.0
epss: "32.4%"
vendor: "OctoPrint"
kev: false
exploited: false
published: "2026-08-21 19:17:03"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T04:25:21+02:00"
---

# CVE-2026-54134

> 7.0 HIGH · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Benachbart | warn |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 42be7409d4820431043da48ece30014e26b47073 (Commit)
- 3e1fa9c6679df57bd50d425b90bef89e880d1385 (Commit)

## Referenzen

- <https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-j4h9-pm27-4rfw>
- <https://github.com/OctoPrint/OctoPrint/commit/579148beeb6d6e9b3d41b1cf32309b47218ed380>
- <https://github.com/OctoPrint/OctoPrint/commit/8e3348197db867c30a32d13984f0bd0d664be413>
- <https://github.com/OctoPrint/OctoPrint/releases/tag/1.11.8>
- <https://github.com/OctoPrint/OctoPrint/releases/tag/2.0.0rc3>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-54134) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_