CVE-2026-104102: copyparty < 1.20.19

Affected technology

copyparty · < 1.20.19
9001

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · Low privileges required · No user interaction required

What an attacker can do

The source says 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. Vendor/CNA’s CVSS 4.0 assessment (base score 5.3/10) rates confidentiality and availability impact as none; integrity impact as low.