{"cve":"CVE-2026-44240","nvd":{"published":"2026-05-12T21:16:16.410","modified":"2026-10-26T17:10:03.270","status":"Deferred","description":"basic-ftp is an FTP client for Node.js. Prior to 5.3.1, basic-ftp is vulnerable to client-side denial of service when parsing FTP control-channel multiline responses. A malicious or compromised FTP server can send an unterminated multiline response during the initial FTP banner phase, before authentication. The client keeps appending attacker-controlled data into FtpContext._partialResponse and repeatedly reparses the accumulated buffer without enforcing a maximum control response size. As a result, an application using basic-ftp can remain stuck in connect() while memory and CPU usage grow under attacker-controlled input. This can lead to process-level denial of service, container OOM kills, worker restarts, queue backlog, or service degradation in applications that automatically connect to FTP endpoints. This vulnerability is fixed in 5.3.1.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400","CWE-770"],"references":["https://github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-rpmf-866q-6p89","https://github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-rpmf-866q-6p89"],"products":[],"source":"nvd","synced_at":"2026-10-26T17:39:09.812804557+00:00"},"epss":{"cve":"CVE-2026-44240","score":0.00465,"percentile":0.40003,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-rpmf-866q-6p89","url":"https://osv.dev/vulnerability/GHSA-rpmf-866q-6p89","summary":"basic-ftp allows a malicious FTP server to cause client-side denial of service via unbounded multiline control response buffering","modified":"2026-09-10T03:51:06.953438756Z","packages":[{"ecosystem":"npm","name":"basic-ftp","purl":"pkg:npm/basic-ftp","ranges":["<5.3.1"],"fixed":["5.3.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}