{"api_version":"1","generated_at":"2026-08-22T00:27:18+00:00","cve":"CVE-2026-54134","urls":{"html":"https://cve.report/CVE-2026-54134","api":"https://cve.report/api/cve/CVE-2026-54134.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-54134","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-54134"},"summary":{"title":"OctoPrint: File exfiltration possible via query parameters on upload endpoints","description":"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.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-08-21 19:17:03","updated_at":"2026-08-21 19:17:03"},"problem_types":["CWE-73","CWE-73 CWE-73: External Control of File Name or Path"],"metrics":[{"version":"4.0","source":"security-advisories@github.com","type":"Secondary","score":"7","severity":"HIGH","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","data":{"version":"4.0","vectorString":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":7,"baseSeverity":"HIGH","attackVector":"ADJACENT","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}},{"version":"4.0","source":"CNA","type":"DECLARED","score":"7","severity":"HIGH","vector":"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","data":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"ADJACENT","baseScore":7,"baseSeverity":"HIGH","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW"}}],"references":[{"url":"https://github.com/OctoPrint/OctoPrint/releases/tag/2.0.0rc3","name":"https://github.com/OctoPrint/OctoPrint/releases/tag/2.0.0rc3","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/OctoPrint/OctoPrint/commit/8e3348197db867c30a32d13984f0bd0d664be413","name":"https://github.com/OctoPrint/OctoPrint/commit/8e3348197db867c30a32d13984f0bd0d664be413","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/OctoPrint/OctoPrint/releases/tag/1.11.8","name":"https://github.com/OctoPrint/OctoPrint/releases/tag/1.11.8","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/OctoPrint/OctoPrint/commit/579148beeb6d6e9b3d41b1cf32309b47218ed380","name":"https://github.com/OctoPrint/OctoPrint/commit/579148beeb6d6e9b3d41b1cf32309b47218ed380","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-j4h9-pm27-4rfw","name":"https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-j4h9-pm27-4rfw","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-54134","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54134","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"OctoPrint","product":"OctoPrint","version":"affected < 1.11.8","platforms":[]},{"source":"CNA","vendor":"OctoPrint","product":"OctoPrint","version":"affected >= 2.0.0rc1, < 2.0.0rc3","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"product":"OctoPrint","vendor":"OctoPrint","versions":[{"status":"affected","version":"< 1.11.8"},{"status":"affected","version":">= 2.0.0rc1, < 2.0.0rc3"}]}],"descriptions":[{"lang":"en","value":"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."}],"metrics":[{"cvssV4_0":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"ADJACENT","baseScore":7,"baseSeverity":"HIGH","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-73","description":"CWE-73: External Control of File Name or Path","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-21T18:28:15.925Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-j4h9-pm27-4rfw","tags":["x_refsource_CONFIRM"],"url":"https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-j4h9-pm27-4rfw"},{"name":"https://github.com/OctoPrint/OctoPrint/commit/579148beeb6d6e9b3d41b1cf32309b47218ed380","tags":["x_refsource_MISC"],"url":"https://github.com/OctoPrint/OctoPrint/commit/579148beeb6d6e9b3d41b1cf32309b47218ed380"},{"name":"https://github.com/OctoPrint/OctoPrint/commit/8e3348197db867c30a32d13984f0bd0d664be413","tags":["x_refsource_MISC"],"url":"https://github.com/OctoPrint/OctoPrint/commit/8e3348197db867c30a32d13984f0bd0d664be413"},{"name":"https://github.com/OctoPrint/OctoPrint/releases/tag/1.11.8","tags":["x_refsource_MISC"],"url":"https://github.com/OctoPrint/OctoPrint/releases/tag/1.11.8"},{"name":"https://github.com/OctoPrint/OctoPrint/releases/tag/2.0.0rc3","tags":["x_refsource_MISC"],"url":"https://github.com/OctoPrint/OctoPrint/releases/tag/2.0.0rc3"}],"source":{"advisory":"GHSA-j4h9-pm27-4rfw","discovery":"UNKNOWN"},"title":"OctoPrint: File exfiltration possible via query parameters on upload endpoints"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-54134","datePublished":"2026-08-21T18:28:15.925Z","dateReserved":"2026-06-11T21:15:33.870Z","dateUpdated":"2026-08-21T18:28:15.925Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-21 19:17:03","lastModifiedDate":"2026-08-21 19:17:03","problem_types":["CWE-73","CWE-73 CWE-73: External Control of File Name or Path"],"metrics":{"cvssMetricV40":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":7,"baseSeverity":"HIGH","attackVector":"ADJACENT","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"54134","Ordinal":"1","Title":"OctoPrint: File exfiltration possible via query parameters on up","CVE":"CVE-2026-54134","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"54134","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"OctoPrint: File exfiltration possible via query parameters on up"}]}}}