{"id":"CVE-2026-104102","title":"copyparty is a portable file server","summary":"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 travers…","severity":"medium","cwe":["CWE-22"],"published":"2026-10-12","updated":"2026-10-13","sourceUpdated":"2026-10-13T17:17:15.633","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-104102","references":[{"url":"https://github.com/9001/copyparty/commit/b331bb1c8c8cc306b91e4d94221969335a7a3e86","label":"security-advisories@github.com"},{"url":"https://github.com/9001/copyparty/releases/tag/v1.20.19","label":"security-advisories@github.com"},{"url":"https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9","label":"security-advisories@github.com"},{"url":"https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9","label":"security-advisories@github.com"},{"url":"https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9","label":"security-advisories@github.com"},{"url":"https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9","label":"security-advisories@github.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-104102"},{"url":"https://github.com/advisories/GHSA-phv8-wgjp-g4p9"},{"url":"https://github.com/9001/copyparty"}],"tags":["nvd","cve.org","ghsa","pip","osv"],"epss":0.00313,"epssPercentile":0.24059,"ingestedAt":"2026-10-12T20:03:12.350Z","vendor":"9001","product":"copyparty","affected":["copyparty < 1.20.19"],"cvss":5.3,"cvssVector":"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","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-13T16:30:31.058298Z"},"cvssSource":"cna","aliases":["GHSA-phv8-wgjp-g4p9"],"ecosystem":"pip","patched":["copyparty 1.20.19"],"slug":"CVE-2026-104102","body":"## Overview\n\ncopyparty 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-104102)\n\nAffected packages:\n\n- `copyparty < 1.20.19`\n\nPatched in:\n\n- `copyparty 1.20.19`\n\nSource: https://github.com/advisories/GHSA-phv8-wgjp-g4p9","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":221003,"id":"CVE-2026-104102","ts":1792026963603,"field":"cvss","old":null,"new":"5.3"},{"seq":221002,"id":"CVE-2026-104102","ts":1792026963603,"field":"severity","old":"none","new":"medium"}]}