VulnerabilityAnalyzed

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.

CRITICAL 9.8EPSS 0.72%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.72%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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 3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.72% probability · 52th percentile
CISA KEV: Not listed
Weakness: CWE-22
Affected: patrickjuchli/basic-ftp
Source: security-advisories@github.com

References

https://github.com/patrickjuchli/basic-ftp/commit/2a2a0e6514357b9eda07c2f8afbd3f04727a7cd9Patch
https://github.com/patrickjuchli/basic-ftp/releases/tag/v5.2.0Release Notes
https://github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-5rq4-664w-9x2cExploit, Mitigation, Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.