High 7.0Published Aug 21, 2026

CVE-2026-54134OctoPrint: File exfiltration possible via query parameters on upload endpoints

Updated under an hour ago (2026-10-19 07:30 UTC)

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Every CVE for OctoPrint

Exploited in the last 30 days

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: 7.0 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-73
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Aug 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

OctoPrint OctoPrint octoprint:octoprint (from the name)	before 1.11.8; from 2.0.0rc1, < 2.0.0rc3	CNA record

References

https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-j4h9-pm27-4rfwx-refsource-confirm
https://github.com/OctoPrint/OctoPrint/commit/579148beeb6d6e9b3d41b1cf32309b47218ed380x-refsource-misc
https://github.com/OctoPrint/OctoPrint/commit/8e3348197db867c30a32d13984f0bd0d664be413x-refsource-misc
https://github.com/OctoPrint/OctoPrint/releases/tag/1.11.8x-refsource-misc
https://github.com/OctoPrint/OctoPrint/releases/tag/2.0.0rc3x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.