CVE-2026-104102 · GHSA-phv8-wgjp-g4p9
copyparty FTP: upload outside defined volumes (limited path traversal)
- Risk score
- 41/100
- CVSS
- 5.3 v4.0
- Exploit chance (30 days)
- 0.3%
- Published
- 12 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 th…
- Affected
- copyparty (pip) < 1.20.19
- Fix
- Upgrade copyparty to 1.20.19 or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 5.3 medium
- On your watchlist: PyPI
Affected packages
| Package | Ecosystem | Vulnerable | Fixed in |
|---|---|---|---|
| copyparty | pip | < 1.20.19 | 1.20.19 |
References
- https://github.com/advisories/GHSA-phv8-wgjp-g4p9
- https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9
- https://nvd.nist.gov/vuln/detail/CVE-2026-104102
- https://github.com/9001/copyparty/commit/b331bb1c8c8cc306b91e4d94221969335a7a3e86
- https://github.com/9001/copyparty/releases/tag/v1.20.19
- https://github.com/advisories/GHSA-phv8-wgjp-g4p9
Original description
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.
Last activity 12 Oct 2026. Patch Forecast updates every hour.