{"id":"CVE-2026-54134","title":"OctoPrint provides a web interface for controlling consumer 3D printers","summary":"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…","severity":"high","cwe":["CWE-73","CWE-436"],"vendor":"OctoPrint","product":"OctoPrint","affected":["OctoPrint <= 1.11.7","OctoPrint >= 2.0.0rc1, <= 2.0.0rc2"],"patched":["OctoPrint 1.11.8","OctoPrint 2.0.0rc3"],"published":"2026-08-21","updated":"2026-10-14","sourceUpdated":"2026-10-14T19:10:00.297","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-54134","references":[{"url":"https://github.com/OctoPrint/OctoPrint/commit/579148beeb6d6e9b3d41b1cf32309b47218ed380","label":"security-advisories@github.com"},{"url":"https://github.com/OctoPrint/OctoPrint/commit/8e3348197db867c30a32d13984f0bd0d664be413","label":"security-advisories@github.com"},{"url":"https://github.com/OctoPrint/OctoPrint/releases/tag/1.11.8","label":"security-advisories@github.com"},{"url":"https://github.com/OctoPrint/OctoPrint/releases/tag/2.0.0rc3","label":"security-advisories@github.com"},{"url":"https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-j4h9-pm27-4rfw","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-j4h9-pm27-4rfw"}],"tags":["nvd","ghsa","pip"],"epss":0.00324,"epssPercentile":0.25261,"ecosystem":"pip","ingestedAt":"2026-06-29T13:24:35.312Z","slug":"CVE-2026-54134","body":"## Overview\n\nOctoPrint 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-54134)\n\nAffected packages:\n\n- `OctoPrint <= 1.11.7`\n- `OctoPrint >= 2.0.0rc1, <= 2.0.0rc2`\n\nPatched in:\n\n- `OctoPrint 1.11.8`\n- `OctoPrint 2.0.0rc3`\n\nSource: https://github.com/advisories/GHSA-j4h9-pm27-4rfw","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}