CVE-2025-3248 Scanner

Langflow is a popular AI-powered platform used to build and manage workflows involving large language models. It is widely used for automating and orchestrating tasks in AI applications. The software is designed to support various integrations and workflows, enabling developers to leverage language models in their systems. It is commonly used by businesses and developers who need to automate processes involving natural language processing (NLP) tasks. Due to its powerful features, it is an attractive target for attackers who may attempt to exploit vulnerabilities in the system. Langflow is available for installation and is commonly deployed in various production environments.

Langflow versions prior to 1.3.0 are vulnerable to a Remote Code Execution (RCE) issue in the /api/v1/validate/code endpoint. This vulnerability allows an unauthenticated attacker to inject arbitrary code into the system by sending malicious HTTP requests. The code injection occurs due to insufficient validation of user inputs in the endpoint. The vulnerability can lead to the execution of arbitrary commands on the underlying server, potentially allowing attackers to gain control over the system. This issue is classified as critical due to its potential impact on the security and integrity of the affected systems.

The vulnerability is located in the /api/v1/validate/code endpoint, where Langflow fails to properly sanitize the input code. By sending a specially crafted payload that exploits the vulnerability, an attacker can execute arbitrary commands on the server. For example, the payload includes a call to the subprocess module to execute system commands like "cat /etc/passwd", which can reveal sensitive information. The issue is triggered when the input code is processed without proper validation, allowing the attacker to execute arbitrary Python code in the context of the server. This vulnerability is particularly dangerous as it allows remote unauthenticated attackers to execute arbitrary commands on the server.

If exploited, the vulnerability allows attackers to execute arbitrary code on the affected system, potentially leading to full server compromise. Attackers could gain unauthorized access to sensitive information, including system files, credentials, and configuration files. Furthermore, the attacker could escalate privileges, execute additional malicious commands, or disrupt the normal operation of the system. The impact of this vulnerability is severe, as it could lead to the total compromise of the affected server, resulting in potential data loss, unauthorized access, and service downtime.

REFERENCES

• https://github.com/langflow-ai/langflow/pull/6911
• https://github.com/langflow-ai/langflow/releases/tag/1.3.0