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.
History

Tue, 13 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 12 Oct 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared 9001
9001 copyparty
Vendors & Products 9001
9001 copyparty

Mon, 12 Oct 2026 18:45:00 +0000

Type Values Removed Values Added
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.
Title copyparty FTP: upload outside defined volumes (limited path traversal)
Weaknesses CWE-22
References
Metrics cvssV4_0

{'score': 5.3, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-10-12T18:32:00.821Z

Updated: 2026-10-13T16:31:17.851Z

Reserved: 2026-10-01T18:05:14.173Z

Link: CVE-2026-104102

cve-icon Vulnrichment

Updated: 2026-10-13T16:31:13.292Z

cve-icon NVD

Status : Deferred

Published: 2026-10-12T19:16:36.713

Modified: 2026-10-13T17:17:15.633

Link: CVE-2026-104102

cve-icon Redhat

No data.