CVE-2026-104102 (GCVE-0-2026-104102)
Vulnerability from cvelistv5 – Published: 2026-10-12 18:32 – Updated: 2026-10-13 16:31
VLAI
EPSS
VEX
Title
copyparty FTP: upload outside defined volumes (limited path traversal)
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 16:30 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/9001/copyparty/security/adviso… | x_refsource_CONFIRM |
| https://github.com/9001/copyparty/commit/b331bb1c… | x_refsource_MISC |
| https://github.com/9001/copyparty/releases/tag/v1.20.19 | x_refsource_MISC |
Impacted products
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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