CVE-2026-39983

References https://github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-chqc-8p9q-pq6q https://github.com/patrickjuchli/basic-ftp/commit/2ecc8e2c500c5234115f06fd1dbde1aa03d70f4b https://github.com/patrickjuchli/basic-ftp/releases/tag/v5.2.1...

Denial Of Service (DoS)

basic-ftp is vulnerable to Denial Of Service DoS. The vulnerability is due to excessive backtracking in the Unix directory listing parser when processing crafted FTP responses, which allows a malicious or compromised FTP server to consume excessive CPU and block the Node.js event loop, causing a...

The vulnerability of the Client.list() function in the FTP-client library basic-ftp of the Node.js software platform allows a hacker to trigger a service failure.

The vulnerability of the Client.list function in the FTP-client library of the basic-ftp software platform for Node.js lies in the use of a regular expression with inefficient computational complexity. Exploiting this vulnerability could allow an attacker to cause service interruptions remotely...

Regular Expression Denial of Service (ReDoS)

Overview basic-ftp is a FTP client for Node.js, supports FTPS over TLS, IPv6, Async/Await, and Typescript. Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS via unanchored regular expressions in Client.list specifically in parseListDOS.ts and...

@fdm-monster/server (>=2.0.11, <=2.1.1), @objectif-lune/node-red-contrib-ftp (>=1.1.0, <=1.2.0) +2 more potentially affected by CVE-2026-102990 via basic-ftp (>=6.0.1, <=6.2.0)

basic-ftp NPM version =6.0.1, =2.0.11, =1.1.0, =1.0.0, =2.0.3-beta, =2.1.4-1257-beta.1 Source cves: CVE-2026-102990 Source advisory: OSV:GHSA-C475-QRG2-PJ4R...

GHSA-C475-QRG2-PJ4R basic-ftp: Quadratic-time CPU denial of service in Client.list() Unix directory-listing parser (RE_LINE backtracking)

Summary Client.list parses the server's directory listing with the Unix-style parser in parseListUnix.js. Its RELINE regex has two adjacent \S+?:\s\S+ groups owner name, then group name followed by a required numeric size group. When a line starts with a valid listing prefix but the tokens after ...

EUVD-2026-90360

basic-ftp: Quadratic-time CPU denial of service in Client.list Unix directory-listing parser RELINE backtracking...

NPM: basic-ftp: Quadratic-time CPU denial of service in Client.list() Unix directory-listing parser (RE_LINE backtracking)

NPM: basic-ftp: Quadratic-time CPU denial of service in Client.list Unix directory-listing parser RELINE backtracking vulnerability discovered by ? in WordPress Npm basic-ftp versions = 6.2.0...

basic-ftp: Quadratic-time CPU denial of service in Client.list() Unix directory-listing parser (RE_LINE backtracking)

Summary Client.list parses the server's directory listing with the Unix-style parser in parseListUnix.js. Its RELINE regex has two adjacent \S+?:\s\S+ groups owner name, then group name followed by a required numeric size group. When a line starts with a valid listing prefix but the tokens after ...

Linux Distros Unpatched Vulnerability : CVE-2026-102990

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

PT-2026-105502

Summary Client.list parses the server's directory listing with the Unix-style parser in parseListUnix.js. Its RE LINE regex has two adjacent S+?:sS+ groups owner name, then group name followed by a required numeric size group. When a line starts with a valid listing prefix but the tokens after it...

CVE-2026-102990

A flaw was found in basic-ftp. A malicious or compromised FTP server can cause a Denial of Service DoS by returning specially crafted Unix directory listings to the client. Inefficient regular expression processing during directory parsing leads to excessive CPU consumption, blocking the...

DEBIAN-CVE-2026-102990

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 RELINE expression in src/parseListUnix.ts backtracks across adjacent variable-length owner and group field...

CVE-2026-102990

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 RELINE expression in src/parseListUnix.ts backtracks across adjacent variable-length owner and group field...

UBUNTU-CVE-2026-102990

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 RELINE expression in src/parseListUnix.ts backtracks across adjacent variable-length owner and group field...

CVE-2026-102990

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 RELINE expression in src/parseListUnix.ts backtracks across adjacent variable-length owner and group field...

CVE-2026-102990 basic-ftp: Quadratic-time CPU denial of service in Client.list() Unix directory-listing parser (RE_LINE backtracking)

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 RELINE expression in src/parseListUnix.ts backtracks across adjacent variable-length owner and group field...

CVE-2026-102990 basic-ftp: Quadratic-time CPU denial of service in Client.list() Unix directory-listing parser (RE_LINE backtracking)

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 RELINE expression in src/parseListUnix.ts backtracks across adjacent variable-length owner and group field...

CVE-2026-102990

The basic-ftp FTP client for Node.js (prior to version 6.2.1 ) is vulnerable to a quadratic-time CPU denial of service . A malicious or compromised FTP server can trigger this by providing a crafted directory listing where the RE_LINE expression in src/parseListUnix.ts backtracks across adjacent ...

CVE-2026-102990 basic-ftp: Quadratic-time CPU denial of service in Client.list() Unix directory-listing parser (RE_LINE backtracking)

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 RELINE expression in src/parseListUnix.ts backtracks across adjacent variable-length owner and group field...