{"id":"CVE-2026-44240","revision":"8d255a0f5b74436eaab180f1ac48677d","records":[{"revision":"8d255a0f5b74436eaab180f1ac48677d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-44240","aliases":[],"title":"basic-ftp allows a malicious FTP server to cause client-side denial of service via unbounded multiline control response buffering","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.","state":0,"publishedAt":"2026-05-12T20:37:43.098+00:00","modifiedAt":"2026-05-14T12:31:57.807+00:00","affected":[{"ecosystem":"Vendor product","name":"basic-ftp","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"patrickjuchli\",\n                    \"product\": \"basic-ftp\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 5.3.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 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,"severity":"HIGH"}],"references":["https://github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-rpmf-866q-6p89"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-44240","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-44240","identifiers":["CVE-2026-44240"]},"retained":false,"historicalAffected":[]}],"coverage":[]}