{"id":"UBUNTU-CVE-2026-44240","details":"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.","modified":"2026-06-03T13:38:52.367144840Z","published":"2026-05-12T21:16:00Z","upstream":["CVE-2026-44240"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-44240"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-44240"},{"type":"REPORT","url":"https://github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-rpmf-866q-6p89"}],"affected":[{"package":{"name":"node-proxy-agents","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/node-proxy-agents?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0~2023071921-5"],"ecosystem_specific":{"binaries":[{"binary_name":"node-agent-base","binary_version":"7.1.0~0~2023071921-5"},{"binary_name":"node-args","binary_version":"5.0.3~0~2023071921-5"},{"binary_name":"node-basic-ftp","binary_version":"5.0.3~0~2023071921-5"},{"binary_name":"node-data-uri-to-buffer","binary_version":"5.0.1~0~2023071921-5"},{"binary_version":"5.0.1~0~2023071921-5","binary_name":"node-degenerator"},{"binary_name":"node-get-uri","binary_version":"6.0.1~0~2023071921-5"},{"binary_name":"node-http-proxy-agent","binary_version":"7.0.0~0~2023071921-5"},{"binary_version":"7.0.1~0~2023071921-5","binary_name":"node-https-proxy-agent"},{"binary_name":"node-pac-proxy-agent","binary_version":"7.0.0~0~2023071921-5"},{"binary_name":"node-pac-resolver","binary_version":"7.0.0~0~2023071921-5"},{"binary_name":"node-proxy","binary_version":"2.1.1~0~2023071921-5"},{"binary_version":"6.3.0~0~2023071921-5","binary_name":"node-proxy-agent"},{"binary_name":"node-socks-proxy-agent","binary_version":"8.0.1~0~2023071921-5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44240.json"}},{"package":{"name":"node-proxy-agents","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/node-proxy-agents?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0~2024040606-5","0~2024040606-6","0~2025070717-1","0~2025070717-2"],"ecosystem_specific":{"binaries":[{"binary_name":"node-agent-base","binary_version":"7.1.4~0~2025070717-2"},{"binary_name":"node-args","binary_version":"5.0.3~0~2025070717-2"},{"binary_name":"node-basic-ftp","binary_version":"5.0.5~0~2025070717-2"},{"binary_version":"6.0.2~0~2025070717-2","binary_name":"node-data-uri-to-buffer"},{"binary_name":"node-degenerator","binary_version":"5.0.1~0~2025070717-2"},{"binary_version":"6.0.5~0~2025070717-2","binary_name":"node-get-uri"},{"binary_name":"node-http-proxy-agent","binary_version":"7.0.2~0~2025070717-2"},{"binary_version":"7.0.6~0~2025070717-2","binary_name":"node-https-proxy-agent"},{"binary_version":"7.2.0~0~2025070717-2","binary_name":"node-pac-proxy-agent"},{"binary_name":"node-pac-resolver","binary_version":"7.0.1~0~2025070717-2"},{"binary_name":"node-proxy","binary_version":"2.2.0~0~2025070717-2"},{"binary_version":"6.5.0~0~2025070717-2","binary_name":"node-proxy-agent"},{"binary_version":"8.0.5~0~2025070717-2","binary_name":"node-socks-proxy-agent"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44240.json"}},{"package":{"name":"node-proxy-agents","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/node-proxy-agents?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0~2025070717-2","0~2025070717-6","0~2025070717+~cs15.2.7-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"7.1.4~0~2025070717+~cs15.2.7-1build1","binary_name":"node-agent-base"},{"binary_version":"5.0.3~0~2025070717+~cs15.2.7-1build1","binary_name":"node-args"},{"binary_version":"5.2.0~0~2025070717+~cs15.2.7-1build1","binary_name":"node-basic-ftp"},{"binary_version":"6.0.2~0~2025070717+~cs15.2.7-1build1","binary_name":"node-data-uri-to-buffer"},{"binary_name":"node-degenerator","binary_version":"5.0.1~0~2025070717+~cs15.2.7-1build1"},{"binary_name":"node-get-uri","binary_version":"6.0.5~0~2025070717+~cs15.2.7-1build1"},{"binary_version":"7.0.2~0~2025070717+~cs15.2.7-1build1","binary_name":"node-http-proxy-agent"},{"binary_version":"7.0.6~0~2025070717+~cs15.2.7-1build1","binary_name":"node-https-proxy-agent"},{"binary_version":"7.2.0~0~2025070717+~cs15.2.7-1build1","binary_name":"node-pac-proxy-agent"},{"binary_version":"7.0.1~0~2025070717+~cs15.2.7-1build1","binary_name":"node-pac-resolver"},{"binary_name":"node-proxy","binary_version":"2.2.0~0~2025070717+~cs15.2.7-1build1"},{"binary_version":"6.5.0~0~2025070717+~cs15.2.7-1build1","binary_name":"node-proxy-agent"},{"binary_version":"8.0.5~0~2025070717+~cs15.2.7-1build1","binary_name":"node-socks-proxy-agent"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44240.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","sc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