What is CVE-2026-27699?

CVE-2026-27699 is a critical-severity vulnerability in Patrickjuchli Basic-ftp, classified under Path Traversal. CVSS score: 9.1/10. Published 2026-02-25.

How severe is CVE-2026-27699?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Path Traversal in Patrickjuchli Basic-ftp

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 t…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.002 (35.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Patrickjuchli Basic-ftp — versions < 5.2.0

Weakness classification (CWE)

CWE-22 — Path Traversal

References

https://github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-5rq4-664w-9x2c (x_refsource_CONFIRM)
https://github.com/patrickjuchli/basic-ftp/commit/2a2a0e6514357b9eda07c2f8afbd3f04727a7cd9 (x_refsource_MISC)
https://github.com/patrickjuchli/basic-ftp/releases/tag/v5.2.0 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-27699?: CVE-2026-27699 is a critical-severity vulnerability in Patrickjuchli Basic-ftp, classified under Path Traversal. CVSS score: 9.1/10. Published 2026-02-25.
How severe is CVE-2026-27699?: Critical severity. CVSS v3 base score is 9.1 out of 10.