CVE-2026-4502: Arbitrary File Write and Remote Code Execution Vulnerability in Langflow v2 API

Published Apr 28, 2026
·
Updated

IBM Langflow Desktop 1.2.0 through 1.8.4 Langflow could allow an authenticated attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing "dot dot" sequences (/../) to write arbitrary files on the system.

Affected Software

3 affected components
IBM Langflow Desktop>=1.2.0<=1.8.4
IBM Langflow Desktop<=1.2.0 - 1.8.4
Langflow Langflow Desktop>=1.2.0<=1.8.4

Remediation

Information

IBM recommends addressing the vulnerability now by upgrading to IBM Langflow Desktop 1.9.0 or newer https://www.langflow.org/blog/langflow-1-9-desktopIf you are already using Langflow Desktop, upgrade in the application to version 1.9.0To install Langflow Desktop for the first time, visit  Langflow Desktop.Download

Event History

Apr 28, 2026
CVE Published
via IBM·12:00 AM
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software
Apr 30, 2026
CVE Published
via MITRE·08:57 PM
Data Sourced
via MITRE·08:57 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·09:16 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-4502?

CVE-2026-4502 is classified as a critical vulnerability due to its potential for arbitrary file write and remote code execution.

2

How do I fix CVE-2026-4502?

To remediate CVE-2026-4502, upgrade IBM Langflow Desktop to a version higher than 1.8.4.

3

Who is affected by CVE-2026-4502?

CVE-2026-4502 affects users of IBM Langflow Desktop versions 1.2.0 through 1.8.4.

4

What kind of attack does CVE-2026-4502 enable?

CVE-2026-4502 enables an authenticated attacker to perform directory traversal attacks, potentially executing arbitrary code.

5

Is authentication required to exploit CVE-2026-4502?

Yes, CVE-2026-4502 requires an attacker to be authenticated to exploit the vulnerability.

Company

Resources

Contact

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