FTP Command Injection via CRLF in basic-ftp

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Summary

CVECVE-2026-39983
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-09 18:17:02 UTC
Updated2026-06-30 03:19:08 UTC
Descriptionbasic-ftp is an FTP client for Node.js. Prior to 5.2.1, basic-ftp allows FTP command injection via CRLF sequences (\r\n) in file path parameters passed to high-level path APIs such as cd(), remove(), rename(), uploadFrom(), downloadTo(), list(), and removeDir(). The library's protectWhitespace() helper only handles leading spaces and returns other paths unchanged, while FtpContext.send() writes the resulting command string directly to the control socket with \r\n appended. This lets attacker-controlled path strings split one intended FTP command into multiple commands. This vulnerability is fixed in 5.2.1.

Risk And Classification

Primary CVSS: v3.1 8.6 HIGH from ADP

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

EPSS: 0.021850000 probability, percentile 0.801840000 (date 2026-07-02)

Problem Types: CWE-93 | CWE-93 CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection') | CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')

VersionSourceTypeScoreSeverityVector
3.1ADPCVSS8.6HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
3.1[email protected]Secondary8.6HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
3.10b0ca135-0b70-47e7-9f44-1890c2a1c46cSecondary8.6HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
3.1CNADECLARED8.6HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

CVSS v3.1 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Patrickjuchli Basic-ftp All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Patrickjuchli Basic-ftp affected < 5.2.1 Not specified
ADP Red Hat Red Hat Developer Hub 1.8 Not specified Not specified
ADP Red Hat Red Hat Developer Hub 1.9 Not specified Not specified
ADP Red Hat Red Hat OpenShift Container Platform 4 Not specified Not specified
ADP Red Hat Self-service Automation Portal 2 Not specified Not specified
ADP Red Hat Red Hat OpenShift AI RHOAI Not specified Not specified

References

ReferenceSourceLinkTags
access.redhat.com/security/cve/CVE-2026-39983 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:9742 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
github.com/patrickjuchli/basic-ftp/commit/2ecc8e2c500c5234115f06fd1dbde1... [email protected] github.com Patch
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39983.json 0b0ca135-0b70-47e7-9f44-1890c2a1c46c security.access.redhat.com
access.redhat.com/errata/RHSA-2026:13826 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-chqc-8p9q-pq6q 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com Exploit, Mitigation, Vendor Advisory
github.com/patrickjuchli/basic-ftp/releases/tag/v5.2.1 [email protected] github.com Product, Release Notes
bugzilla.redhat.com/show_bug.cgi 0b0ca135-0b70-47e7-9f44-1890c2a1c46c bugzilla.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
ADP2026-04-09T18:02:16.209ZReported to Red Hat.
ADP2026-04-09T17:05:46.228ZMade public.

Solutions

ADP: RHSA-2026:9742: Red Hat Developer Hub 1.8

ADP: RHSA-2026:13826: Red Hat Developer Hub 1.9

Workarounds

ADP: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

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