{"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":"none","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"}],"tags":["nvd"],"epss":0.00313,"epssPercentile":0.22409,"ingestedAt":"2026-10-12T20:03:12.350Z","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.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}