{"id":"CVE-2026-104102","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-104102","generatedAt":"2026-10-28T00:57:18.014Z","title":"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.","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.","published":"2026-10-12T19:16:37.000Z","lastModified":"2026-10-13T17:17:16.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":5.3,"severity":"MEDIUM","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-22"],"affected":[],"epss":{"score":0.00313,"percentile":0.23998,"date":"2026-10-26","history":[{"date":"2026-10-13","score":0.00313,"percentile":0.22409}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.31%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-12T19:16:37.000Z","detail":{"score":"5.3","severity":"MEDIUM","publishedAt":"2026-10-12T19:16:36.713Z"},"summary":"New CVE, medium severity (CVSS 5.3)."}],"references":[{"url":"https://github.com/9001/copyparty/commit/b331bb1c8c8cc306b91e4d94221969335a7a3e86","source":"security-advisories@github.com"},{"url":"https://github.com/9001/copyparty/releases/tag/v1.20.19","source":"security-advisories@github.com"},{"url":"https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9","source":"security-advisories@github.com"},{"url":"https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9","source":"security-advisories@github.com"},{"url":"https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9","source":"security-advisories@github.com"},{"url":"https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-104102","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}