CVE-2026-27699

CRITICAL

9.1

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.

CVE Details

CVSS v3.1 Score9.1

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/25/2026

Last Modified2/26/2026

Sourcenvd

Honeypot Sightings0

Affected Products

patrickjuchli:basic-ftp

Weaknesses (CWE)

CWE-22

References

https://github.com/patrickjuchli/basic-ftp/commit/2a2a0e6514357b9eda07c2f8afbd3f04727a7cd9(security-advisories@github.com)

https://github.com/patrickjuchli/basic-ftp/releases/tag/v5.2.0(security-advisories@github.com)

https://github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-5rq4-664w-9x2c(security-advisories@github.com)

IOC Correlations

No correlations recorded

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