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.
Metrics
Affected Vendors & Products
References
History
Tue, 13 Oct 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Mon, 12 Oct 2026 21:45:00 +0000
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| First Time appeared |
9001
9001 copyparty |
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| Vendors & Products |
9001
9001 copyparty |
Mon, 12 Oct 2026 18:45:00 +0000
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| 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 |
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| Metrics |
cvssV4_0
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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
Updated: 2026-10-13T16:31:13.292Z
Status : Deferred
Published: 2026-10-12T19:16:36.713
Modified: 2026-10-13T17:17:15.633
Link: CVE-2026-104102
No data.