CVE-2026-3346: Stored Cross-Site Scripting (XSS) in Langflow Markdown Rendering via rehypeRaw

Published Apr 28, 2026
·
Updated

IBM Langflow Desktop 1.6.0 through 1.8.4 Lanflow is vulnerable to stored cross-site scripting. This vulnerability allows an authenticated user to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session.

Affected Software

3 affected components
IBM Langflow Desktop>=1.6.0<=1.8.4
IBM Langflow Desktop<=1.6.0 - 1.8.4
Langflow Langflow Desktop>=1.6.0<=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-1-8-desktopIf you are already using Langflow Desktop, upgrade in the application to version 1.9.0To install Langflow Desktop for the first time, visit Download Langflow Desktop.

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·09:06 PM
Data Sourced
via MITRE·09:06 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-2026-3346?

CVE-2026-3346 is considered a high severity vulnerability due to its potential for stored cross-site scripting exploitation.

2

How do I fix CVE-2026-3346?

To fix CVE-2026-3346, upgrade IBM Langflow Desktop to a version later than 1.8.4.

3

Who is affected by CVE-2026-3346?

CVE-2026-3346 affects users of IBM Langflow Desktop versions 1.6.0 through 1.8.4.

4

What type of vulnerability is CVE-2026-3346?

CVE-2026-3346 is a stored cross-site scripting (XSS) vulnerability.

5

How can CVE-2026-3346 be exploited?

CVE-2026-3346 can be exploited by authenticated users embedding arbitrary JavaScript code in the Web UI.

Company

Resources

Contact

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CVE-2026-3346 - Stored Cross-Site Scripting (XSS) in Langflow Markdown Rendering via rehypeRaw - SecAlerts