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: 2026-10-12
Score: 5.3 Medium
EPSS: n/a
KEV: No
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Remediation

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History

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'}

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

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

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

Link: CVE-2026-104102

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

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

Modified: 2026-10-12T19:16:36.847

Link: CVE-2026-104102

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-12T19:30:06Z

Weaknesses
  • CWE-22

    Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')