CVE-2026-27699

The `basic-ftp` FTP client library for Node.js contains a path traversal vulnerability (CWE-22) in versions prior to 5.2.0 in the `downloadToDir()` method. A malicious FTP server can send directory listings with filenames containing path traversal sequences (`../`) that cause files to be written outside the intended download directory. Version 5.2.0 patches the issue.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/patrickjuchli/basic-ftp/commit/2a2a0e6514357b9eda07c2f8afbd3f04727a7cd9	Patch
https://github.com/patrickjuchli/basic-ftp/releases/tag/v5.2.0	Release Notes
https://github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-5rq4-664w-9x2c	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:patrickjuchli:basic-ftp:*:*:*:*:*:node.js:*:*

History

No history.

Information

Published : 2026-02-25 15:20

Updated : 2026-06-17 10:27

NVD link : CVE-2026-27699

Mitre link : CVE-2026-27699

CVE.ORG link : CVE-2026-27699

JSON object : View

Products Affected

patrickjuchli

basic-ftp

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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