CVE-2026-3346

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

Published Apr 30, 2026 CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

Vendor Solution

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.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Langflow
Langflow langflow Desktop
CPEs cpe:2.3:a:langflow:langflow_desktop:*:*:*:*:*:*:*:*
Vendors & Products Langflow
Langflow langflow Desktop
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title Stored Cross-Site Scripting (XSS) in Langflow Markdown Rendering via rehypeRaw
First Time appeared Ibm
Ibm langflow Desktop
Weaknesses CWE-89
CPEs cpe:2.3:a:ibm:langflow_desktop:1.6.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:langflow_desktop:1.8.4:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm langflow Desktop
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ibm
Published
Updated
May 1, 2026, 4:38 PM
Reserved
Feb 27, 2026, 4:11 PM
Status
Analyzed
Published
Apr 30, 2026, 9:16 PM
Modified
Oct 26, 2026, 9:10 PM