by Kastro
Paper/Archive/CVE-2026-27699

CVE-2026-27699

patrickjuchli basic-ftp — Basic FTP has Path Traversal Vulnerability in its downloadToDir() method

EPSS 0.9%public exploitCVSS 9.8
critical.is priorityof 100
52
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 60.9.609 × 2012.2Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
basic-ftp< 5.2.0–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

refgithub.com/patrickjuchli/basic-ftp/security/advisories/GHSA-5rq4-664w-9x2crefgithub.com/patrickjuchli/basic-ftp/commit/2a2a0e6514357b9eda07c2f8afbd3f04727a7cd9refgithub.com/patrickjuchli/basic-ftp/releases/tag/v5.2.0