CVE-2026-19286

Analyzed Analyzed - Analysis Complete

Remote Code Execution in IBM Langflow OSS

Publication date: 2026-08-28

Last updated on: 2026-09-01

Assigner: IBM Corporation

Description

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to execute arbitrary code due to improper enforcement of security restrictions on the A2A public endpoint.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-28

Last Modified

2026-09-01

Generated

2026-09-18

AI Q&A

2026-08-29

EPSS Evaluated

2026-09-15

NVD

CVE-2026-19286

EUVD

EUVD-2026-67956

Affected Vendors & Products

Vendor	Product	Version / Range
langflow	langflow	From 1.0.0 (inc) to 1.11.2 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-94	The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

Attack-Flow Graph

Executive Summary

This vulnerability in IBM Langflow OSS versions 1.0.0 through 1.11.1 allows a remote attacker to execute arbitrary code. It is caused by improper enforcement of security restrictions on the A2A public endpoint, which should not be exposed to untrusted users.

Detection Guidance

To detect this vulnerability, check if the IBM Langflow OSS A2A public endpoint is exposed on your network. Verify if the endpoint allows unauthenticated access or improperly enforces security restrictions. Use network scanning tools like nmap to identify open ports and services. Example command: nmap -sV -p- <target_IP>. Inspect server logs for unusual requests to the A2A endpoint.

Impact Analysis

An attacker could exploit this to run malicious code on your system, potentially stealing data, installing malware, or disrupting services. Since the endpoint is public, anyone on the internet could attempt to exploit it if not properly secured.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR (data protection) and HIPAA (health information privacy) requirements. Organizations may face legal penalties, fines, or reputational damage if exploited.

Mitigation Strategies

Immediately restrict access to the A2A public endpoint in IBM Langflow OSS versions 1.0.0 through 1.11.1. Update to the latest patched version if available. Monitor network traffic for suspicious activity targeting this endpoint.

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