CVE-2026-104102: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in 9001 copyparty
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.
CVSS v4.0
Score 5.3medium
Affected software
9001
copyparty
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-01T18:05:14.173Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6acd2ba32cdf04f656c1d70b
Added to database: 10/12/2026, 18:49:07 UTC
Last updated: 10/12/2026, 18:49:07 UTC
Views: 1
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