PythonFunction Code Injection in Langflow Enables Remote Code Execution

Publication date: 2026-01-23

Last updated on: 2026-02-18

Assigner: Zero Day Initiative

Description

Langflow PythonFunction Code Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Langflow. Attack vectors and exploitability will vary depending on the configuration of the product. The specific flaw exists within the handling of Python function components. Depending upon product configuration, an attacker may be able to introduce custom Python code into a workflow. An attacker can leverage this vulnerability to execute code in the context of the application. Was ZDI-CAN-27497.

CVSS Scores

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Meta Information

Published

2026-01-23

Last Modified

2026-02-18

Generated

2026-07-06

AI Q&A

2026-01-23

EPSS Evaluated

2026-07-04

NVD

CVE-2026-0771

EUVD

EUVD-2026-4460

Affected Vendors & Products

Vendor	Product	Version / Range
langflow	langflow	1.4.2

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

CVE-2026-0771 is a remote code execution vulnerability in Langflow that arises from improper handling of Python function components. It allows remote attackers to inject and execute arbitrary Python code within workflows, potentially running code with the application's privileges. The exploitability and attack methods depend on how the product is configured. [1]

Impact Analysis

This vulnerability can allow attackers to execute arbitrary code remotely on affected Langflow installations, which can lead to full compromise of the application. This includes unauthorized access, modification, or deletion of data, disruption of service, and potential further attacks within the environment. [1]

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