basic-ftp: Uncaught exception crashes the Node.js process when a password (or resumed-download path) contains CR/LF

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-126346
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-12 22:19:19 UTC
Updated2026-11-12 22:19:19 UTC
Descriptionbasic-ftp is an FTP client for Node.js. Prior to 6.2.3, FTPContext.send() throws when a command contains carriage return, line feed, or NUL characters, but calls made from response handlers execute synchronously inside the control socket's data event without an exception boundary. In Client.login(), an attacker-influenced password reaches the PASS command after a server sends a 331 response, and in a resumed download an attacker-influenced remote path reaches the RETR command after a 350 response to REST. The resulting exception does not reject client.access() or downloadTo(), escapes ordinary promise error handling, and terminates the Node.js process, while the validation guard still prevents command injection. This issue is fixed in version 6.2.3.

Risk And Classification

Primary CVSS: v3.1 5.9 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-248 | CWE-755 | CWE-248 CWE-248: Uncaught Exception | CWE-755 CWE-755: Improper Handling of Exceptional Conditions

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Patrickjuchli Basic-ftp affected < 6.2.3 Not specified

References

ReferenceSourceLinkTags
github.com/patrickjuchli/basic-ftp/releases/tag/v6.2.3 [email protected] github.com
github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-r4jh-29pc-gfqr [email protected] github.com
github.com/patrickjuchli/basic-ftp/commit/0495b906bdf891e68806721b07b333... [email protected] github.com
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