CVE-2026-85025

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Unauthenticated Remote Code Execution in IBM Langflow OSS

Publication date: 2026-09-10

Last updated on: 2026-09-10

Assigner: IBM Corporation

Description

IBM Langflow OSS 1.0.0 through 1.11.5 Langflow could allow an unauthenticated attacker to execute arbitrary code and access or modify chat sessions through publicly shared MCP project endpoints due to improper enforcement of public-flow security restrictions and session isolation controls.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-10

Last Modified

2026-09-10

Generated

2026-09-11

AI Q&A

2026-09-11

EPSS Evaluated

N/A

NVD

CVE-2026-85025

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	langflow	From 1.0.0 (inc) to 1.11.5 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-863	The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

Executive Summary

This vulnerability in IBM Langflow OSS 1.0.0 through 1.11.5 allows an unauthenticated attacker to execute arbitrary code and access or modify chat sessions. It occurs due to improper enforcement of public-flow security restrictions and session isolation controls, particularly through publicly shared MCP project endpoints.

Impact Analysis

An attacker could exploit this to run malicious code on your system, steal sensitive data from chat sessions, or alter conversations. Since no authentication is required, any exposed MCP project endpoints are potential entry points for compromise.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection and confidentiality. Organizations using affected versions may face compliance violations and potential legal consequences.

Mitigation Strategies

Upgrade IBM Langflow OSS to a version beyond 1.11.5 to address the improper public-flow security restrictions and session isolation controls. Ensure all MCP project endpoints are reviewed for proper access controls and session management.

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