CVE-2026-12944

Received Received - Intake

Arbitrary Code Execution in IBM Langflow OSS

Publication date: 2026-09-14

Last updated on: 2026-09-16

Assigner: IBM Corporation

Description

IBM Langflow OSS 1.0.0 through 1.10.0 can allow attackers to execute arbitrary Python code with root privileges (UID=0) on the Langflow server by submitting components containing socket or urllib imports. This enables: (1) AWS credential theft via IMDSv1 SSRF with full IAM role permissions, (2) arbitrary file exfiltration from the container filesystem, and (3) lateral movement to internal services (PostgreSQL, Redis) within the Docker network. The scanner incorrectly returns "validated": true, providing a false security signal.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-14

Last Modified

2026-09-16

Generated

2026-10-05

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-03

NVD

CVE-2026-12944

EUVD

EUVD-2026-78164

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	langflow	From 1.0.0 (inc) to 1.10.0 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-918	The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

Executive Summary

IBM Langflow OSS versions 1.0.0 through 1.10.0 allow attackers to execute arbitrary Python code with root privileges on the server by submitting components with socket or urllib imports. This leads to unauthorized code execution with full system access.

Detection Guidance

Detecting this vulnerability requires inspecting Langflow server components for socket or urllib imports in submitted code. Check server logs for unusual Python code execution patterns or network connections to external services. Review Docker container processes for unexpected privilege escalations or network activity.

Impact Analysis

Attackers can steal AWS credentials via IMDSv1 SSRF, exfiltrate files from the container, or move laterally to internal services like PostgreSQL or Redis. The vulnerability grants full IAM role permissions and root-level access to the server.

Compliance Impact

This vulnerability likely violates compliance requirements due to unauthorized access, data exfiltration risks, and potential exposure of sensitive data. It undermines security controls for GDPR (data protection) and HIPAA (health data privacy).

Mitigation Strategies

Immediately upgrade Langflow to a patched version beyond 1.10.0. Disable IMDSv1 if used for AWS metadata access. Restrict container privileges by running as non-root user. Implement network segmentation to limit lateral movement. Monitor for unauthorized file access or network exfiltration attempts.

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