CVE-2026-3346 PUBLISHED

Stored Cross-Site Scripting (XSS) in Langflow Markdown Rendering via rehypeRaw

Assigner: ibm
Reserved: 27.02.2026 Published: 30.04.2026 Updated: 30.04.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CVSS Score: 6.4

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	Low	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	IBM
Product	Langflow Desktop
Versions	affected from 1.6.0 to 1.8.4 (incl.)

Solutions

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.

References

https://www.ibm.com/support/pages/node/7271095

Problem Types

CWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') CWE