CVE-2026-116844 | BDVDB-2026-396458 Detail
fclairambftpserverlib
Description#
Fclairamb ftpserverlib through 0.32.4 contains a cleartext transmission vulnerability because TransferOpen checks only the transferTLS flag set by PROT, not whether the prepared data connection uses TLS. When a client sends PROT P after PASV or PORT, file contents and directory listings cross the network unencrypted, even with mandatory encryption, letting on-path attackers read or modify them.
Impact#
Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact none. Attack vector: network.
Weaknesses#
- CWE-319 Cleartext Transmission of Sensitive Information
References#
- https://github.com/fclairamb/ftpserverlib/pull/685
- https://github.com/fclairamb/ftpserverlib/blob/v0.32.4/handle_misc.go#L29-L31
- https://github.com/fclairamb/ftpserverlib/blob/v0.32.4/client_handler.go#L720
- https://www.vulncheck.com/advisories/fclairamb-ftpserverlib-through-0.32.4-cleartext-ftpes-data-transfer-via-prot-p
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.