{"id":"CVE-2026-102990","summary":"basic-ftp: Quadratic-time CPU denial of service in Client.list() Unix directory-listing parser (RE_LINE backtracking)","details":"basic-ftp is an FTP client for Node.js. Prior to 6.2.1, Client.list() can be forced by a malicious or compromised FTP server to spend quadratic CPU time parsing a directory listing because the RE_LINE expression in src/parseListUnix.ts backtracks across adjacent variable-length owner and group fields when a long Unix-style line has a valid prefix but cannot satisfy the later size and date fields. parseList() selects a parser from the last nonblank line and then applies it to every line, so a normal final line can select the Unix parser while an earlier crafted line blocks the Node.js event loop and freezes the process. This issue is fixed in version 6.2.1.","aliases":["GHSA-c475-qrg2-pj4r"],"modified":"2026-10-02T03:47:25.540540103Z","published":"2026-09-30T19:44:47.303Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-1333"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102990.json"},"references":[{"type":"WEB","url":"https://github.com/patrickjuchli/basic-ftp/releases/tag/v6.2.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102990.json"},{"type":"ADVISORY","url":"https://github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-c475-qrg2-pj4r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102990"},{"type":"FIX","url":"https://github.com/patrickjuchli/basic-ftp/commit/d0d9e07c56e519587bb50532ac6eadbb0cb0cfe9"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/patrickjuchli/basic-ftp","events":[{"introduced":"0"},{"fixed":"d0d9e07c56e519587bb50532ac6eadbb0cb0cfe9"},{"fixed":"a5b160ff7d127130107789029aec98632c51fd60"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"6.2.1"}]}}],"versions":["v6.2.0","v6.1.0","v6.0.2","v6.0.1","v6.0.0","v5.3.1","v5.3.0","v5.2.2","v5.2.1","v5.2.0","v5.1.0","v5.0.5","v5.0.4","v5.0.3","v5.0.2","v5.0.1","v5.0.0","4.6.6","v4.6.5","v4.6.4","v4.6.3","v4.6.2","v4.6.1","v4.6.0","v4.5.4","v4.5.3","v4.5.2","v4.5.1","v4.5.0","v4.4.1","v4.4.0","v4.3.2","v4.3.1","v4.3.0","v4.2.1","v4.2.0","v4.1.0","v4.0.2","v4.0.1","v4.0.0","v3.8.3","v3.8.2","v3.8.1","v3.8.0","v3.7.1","v3.7.0","v3.6.0","v3.5.0","v3.4.4","v3.4.3","v3.4.2","v3.4.1","v3.4.0","v3.3.1","v3.3.0","v3.2.2","v3.2.1","v3.2.0","v3.1.1","v3.1.0","v3.0.0","v2.17.1","v2.17.0","v2.16.1","v2.16.0","v2.15.0","v2.14.4","v2.14.3","v2.14.2","v2.14.1","v2.14.0","v2.13.2","v2.13.1","v2.13.0","v2.12.3","v2.12.2","v2.12.1","v2.12.0","v2.10.0","v2.9.2","v2.9.1","v2.9.0","v2.8.3","v2.8.2","v2.8.1","v2.8.0","v2.7.1","v2.7.0","v2.6.2","v2.6.1","v2.6.0","v2.5.2","v2.5.1","v2.5.0","v2.4.2","v2.4.1","v2.4.0","v2.3.3","v2.3.2","v2.3.1","v2.3.0","v2.2.1","v2.2.0","v2.1.0","v2.0.0","v1.2.0","v1.1.1","v1.1.0","v1.0.9","v1.0.8","v1.0.7","1.0.6","v1.0.5","v1.0.4","v1.0.3","v1.0.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102990.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}