{"cve":"CVE-2026-102990","nvd":{"published":"2026-09-30T20:17:26.140","modified":"2026-09-30T21:17:06.307","status":"Deferred","description":"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.","cvss_v4":{"vector":"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","score":8.2},"cvss_v3":null,"cwes":["CWE-1333"],"references":["https://github.com/patrickjuchli/basic-ftp/commit/d0d9e07c56e519587bb50532ac6eadbb0cb0cfe9","https://github.com/patrickjuchli/basic-ftp/releases/tag/v6.2.1","https://github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-c475-qrg2-pj4r","https://github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-c475-qrg2-pj4r"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:57:46.668721662+00:00"},"epss":{"cve":"CVE-2026-102990","score":0.0037,"percentile":0.30641,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-c475-qrg2-pj4r","url":"https://osv.dev/vulnerability/GHSA-c475-qrg2-pj4r","summary":"basic-ftp: Quadratic-time CPU denial of service in Client.list() Unix directory-listing parser (RE_LINE backtracking)","modified":"2026-10-01T15:00:04.517943812Z","packages":[{"ecosystem":"npm","name":"basic-ftp","purl":"pkg:npm/basic-ftp","ranges":["<6.2.1"],"fixed":["6.2.1"]}]}],"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."]}