---
id: CVE-2026-104102
title: copyparty is a portable file server
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 travers…
severity: none
cwe:
  - CWE-22
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T19:16:36.847'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104102'
references:
  - url: >-
      https://github.com/9001/copyparty/commit/b331bb1c8c8cc306b91e4d94221969335a7a3e86
    label: security-advisories@github.com
  - url: 'https://github.com/9001/copyparty/releases/tag/v1.20.19'
    label: security-advisories@github.com
  - url: 'https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9'
    label: security-advisories@github.com
  - url: 'https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9'
    label: security-advisories@github.com
tags:
  - nvd
ingestedAt: '2026-10-12T20:03:12.350Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.