CVE-2026-104102
Severity not reportedcopyparty is a portable file server.
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.
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/9001/copyparty/commit/b331bb1c8c8cc306b91e4d94221969335a7a3e86 security-advisories@github.com
- https://github.com/9001/copyparty/releases/tag/v1.20.19 security-advisories@github.com
- https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9 security-advisories@github.com
- https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9 security-advisories@github.com
- https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9 security-advisories@github.com
- https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9 security-advisories@github.com