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CVE-2026-39983— FTP Command Injection via CRLF in basic-ftp

CVSS 8.6 · High EPSS 1.84% · P83
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I. Basic Information for CVE-2026-39983

Vulnerability Information
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Vulnerability Title
FTP Command Injection via CRLF in basic-ftp
Source: NVD (National Vulnerability Database)
Vulnerability 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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
对CRLF序列的转义处理不恰当(CRLF注入)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Basic FTP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Basic FTP是Patrick Juchli个人开发者的一个Node.js的FTP客户端库。 Basic FTP 5.2.1之前版本存在安全漏洞，该漏洞源于文件路径参数中可能包含CRLF序列，可能导致FTP命令注入攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
patrickjuchlibasic-ftp < 5.2.1 -

II. Public POCs for CVE-2026-39983

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 7816 chars
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III. Intelligence Information for CVE-2026-39983

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IV. Related Vulnerabilities

Same product: basic-ftp
Same vendor: patrickjuchli
Same weakness: CWE-93

V. Comments for CVE-2026-39983

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