# CVE-2026-39983: node-proxy-agents: basic-ftp is an FTP client for Node.js

CVE-2026-39983 is fixed in node-proxy-agents on 1 platform by DEBIAN-CVE-2026-39983 (version 0~2025070717+~cs15.3.7-1), released April 9, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-39983
- Priority: High
- CVSS: 8.6 (high)
- EPSS: 0.0222
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 9, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | node-proxy-agents Debian 14 | 0~2025070717+~cs15.3.7-1 | [DEBIAN-CVE-2026-39983](https://patchblox.com/security/data/fix/linux/debian-cve-2026-39983.md) | Apr 9, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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