Improper Path Handling in Copyparty File Server by 9001
CVE-2026-104102

5.3MEDIUM

Key Information:

Vendor

9001

Status
Copyparty
Vendor
CVE Published:
12 October 2026

What is CVE-2026-104102?

Copyparty, a portable file server, experienced a vulnerability prior to version 1.20.19 that allowed low-privileged authenticated users to manipulate FTP upload paths. This weakness permitted users to create new files outside of designated copyparty volumes when FTP or FTPS was enabled. While the attacker cannot read or overwrite existing files, the capability to generate files in unintended locations exposes risks, especially if other applications on the same host process these files. Version 1.20.19 addresses this issue, restricting upload destinations to configured volumes.

Affected Version(s)

copyparty < 1.20.19

References

https://github.com/9001/copyparty/security/advisories/GHS...
x_refsource_CONFIRM
https://github.com/9001/copyparty/security/advisories/GHS...
x_refsource_MISC
https://github.com/9001/copyparty/commit/b331bb1c8c8cc306...
x_refsource_MISC

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.