CVE-2026-39983

Published Apr 9, 2026

Last updated 17 days ago

Overview

Description
basic-ftp is an FTP client for Node.js. Prior to 5.2.1, basic-ftp allows FTP command injection via CRLF sequences (\r\n) in file path parameters passed to high-level path APIs such as cd(), remove(), rename(), uploadFrom(), downloadTo(), list(), and removeDir(). The library's protectWhitespace() helper only handles leading spaces and returns other paths unchanged, while FtpContext.send() writes the resulting command string directly to the control socket with \r\n appended. This lets attacker-controlled path strings split one intended FTP command into multiple commands. This vulnerability is fixed in 5.2.1.
Source
security-advisories@github.com
NVD status
Analyzed
Products
basic-ftp

Risk scores

CVSS 3.1

Type
Secondary
Base score
8.6
Impact score
4.7
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
Severity
HIGH

Weaknesses

security-advisories@github.com
CWE-93

Social media

Hype score
Not currently trending

Configurations