Quick answers
- Is CVE-2026-104102 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-104102 being exploited in the wild.
- How severe is CVE-2026-104102?
- Medium severity, with a CVSS score of 4, published 12 October 2026.
- Which products and versions are affected?
- 9001 Copyparty < 1.20.19; copyparty (PyPI) < 1.20.19, ECOSYSTEM:introduced=0,fixed=1.20.19.
- Is there a fix for CVE-2026-104102?
- Yes. copyparty (PyPI): upgrade to 1.20.19 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-104102 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-104102?
- Check whether you run 9001 Copyparty or copyparty (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- copyparty (PyPI): upgrade to 1.20.19 or later
pip install "copyparty>=1.20.19"
Technical details
This is a limited path traversal vulnerability in copyparty's FTP/FTPS upload handler that allows authenticated users to write files outside the configured volumes. The attack requires the FTP server to be explicitly enabled, an attacker to authenticate with valid credentials, and a precondition that other software on the system automatically executes newly created files. The vulnerability does not permit file overwrite, download of existing files, or arbitrary code execution through copyparty itself.
Affected products
- 9001 copyparty < 1.20.19
Identifiers
- CVE-2026-104102
- GHSA-phv8-wgjp-g4p9
Timeline
- 2026-07-27: disclosed
- 2026-10-15: advisory