CVE-2026-27699 describes a critical path traversal vulnerability (CWE-22) in the Node.js basic-ftp client library, affecting versions prior to 5.2.0. A malicious FTP server can exploit the downloadToDir() method by sending directory listings with ".." sequences, allowing arbitrary file writes outside the intended download directory. This vulnerability carries a CVSS score of 9.8 (Critical) due to its network-based attack vector, low complexity, and high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered some community discussion, indicating awareness.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 5.2.0CPE matchmatch criteria | cpe:2.3:a:patrickjuchli:basic-ftp:*:*:*:*:*:node.js:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.