CVE-2026-119147
ProFTPD before 1.3.9e and 1.3.10rc5 mod_sftp Copy-File Authorization Bypass
- State
- Published
- Severity
- 5.3 Medium
- Published
- Oct 30, 2026
- Updated
- Oct 30, 2026
- Reserved
- Oct 29, 2026
Description
ProFTPD before 1.3.9e and 1.3.10rc5 contains an authorization bypass in the mod_sftp copy-file extension handler that skips Limit WRITE checks for new destination files. Authenticated SFTP users can copy any readable file to a new path in write-denied directories, creating files where uploads are forbidden.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N | VulnCheck |
Weaknesses
- CWE-863 Incorrect Authorization
Affected Products
| Product | Versions |
|---|---|
ProFTPDProFTPD Project |
|
References
- https://github.com/proftpd/proftpd/commit/b7d3de4565ae448a510feecd17b41923e44bfe16patch
- https://github.com/proftpd/proftpd/blob/v1.3.9d/contrib/mod_sftp/fxp.c#L4748technical-description
- ProFTPD v1.3.9e Release Notesrelease-notes
- ProFTPD v1.3.10rc5 Release Notesrelease-notes
- https://abraxaslabs.tech/research/proftpd-sftp-copy-file-writethird-party-advisory
- https://github.com/proftpd/proftpdproduct
- VulnCheck Advisory: ProFTPD before 1.3.9e and 1.3.10rc5 mod_sftp Copy-File Authorization Bypassthird-party-advisory
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