{"id":"CVE-2026-104102","state":"PUBLISHED","title":"copyparty FTP: upload outside defined volumes (limited path traversal)","description":"copyparty is a portable file server. Prior to 1.20.19, FTP upload path handling does not confine destinations to configured copyparty volumes. When FTP or FTPS is explicitly enabled, a low-privileged authenticated user can submit traversal paths during upload to create a new file outside configured volumes wherever the copyparty process has write permission. The attacker cannot read or overwrite files, the output name receives a randomized suffix, and copyparty does not execute the file; however, unrelated software on the same host could process the newly created file. This issue is fixed in version 1.20.19.","publishedAt":"2026-10-12T18:32:00.821Z","updatedAt":"2026-10-13T16:31:17.851Z","severity":{"score":5.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["9001 copyparty"],"affected":[{"vendor":"9001","product":"copyparty","versions":[{"version":"< 1.20.19","status":"affected"}]}],"references":["https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9","https://github.com/9001/copyparty/commit/b331bb1c8c8cc306b91e4d94221969335a7a3e86","https://github.com/9001/copyparty/releases/tag/v1.20.19"],"weaknesses":["CWE-22"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/104xxx/CVE-2026-104102.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-104102","state":"PUBLISHED","datePublished":"2026-10-12T18:32:00.821Z","dateUpdated":"2026-10-13T16:31:17.851Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-01T18:05:14.173Z"},"containers":{"cna":{"title":"copyparty FTP: upload outside defined volumes (limited path traversal)","descriptions":[{"lang":"en","value":"copyparty is a portable file server. Prior to 1.20.19, FTP upload path handling does not confine destinations to configured copyparty volumes. When FTP or FTPS is explicitly enabled, a low-privileged authenticated user can submit traversal paths during upload to create a new file outside configured volumes wherever the copyparty process has write permission. The attacker cannot read or overwrite files, the output name receives a randomized suffix, and copyparty does not execute the file; however, unrelated software on the same host could process the newly created file. This issue is fixed in version 1.20.19."}],"affected":[{"vendor":"9001","product":"copyparty","versions":[{"version":"< 1.20.19","status":"affected"}]}],"references":[{"url":"https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9","name":"https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9","name":"https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9","tags":["x_refsource_MISC"]},{"url":"https://github.com/9001/copyparty/commit/b331bb1c8c8cc306b91e4d94221969335a7a3e86","name":"https://github.com/9001/copyparty/commit/b331bb1c8c8cc306b91e4d94221969335a7a3e86","tags":["x_refsource_MISC"]},{"url":"https://github.com/9001/copyparty/releases/tag/v1.20.19","name":"https://github.com/9001/copyparty/releases/tag/v1.20.19","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-12T18:32:00.821Z"},"source":{"advisory":"GHSA-phv8-wgjp-g4p9","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-13T16:30:31.058298Z","id":"CVE-2026-104102","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-13T16:31:17.851Z"}}]}}}