CVE-2026-39983
8.6 · HIGHOverview
CVE-2026-39983 is a high-severity vulnerability affecting patrickjuchli basic-ftp. It was published on April 9, 2026 and has a CVSS 3.1 base score of 8.6 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from patrickjuchli. Update basic-ftp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| patrickjuchli | basic-ftp | >= 0, < 5.2.1 | Affected |
References
Frequently Asked Questions
What is CVE-2026-39983?
CVE-2026-39983 is a high-severity vulnerability affecting patrickjuchli basic-ftp. It was published on April 9, 2026 and has a CVSS 3.1 base score of 8.6 (HIGH).
How severe is CVE-2026-39983?
This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-39983?
Check the references section for vendor advisories and patches from patrickjuchli. Update basic-ftp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-39983?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-39983 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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