Executive Summary

CVE-2025-68477 is a Server-Side Request Forgery (SSRF) vulnerability in Langflow versions prior to 1.7.0. Langflow's API Request component allows users to specify URLs for HTTP requests within a workflow, but it only performs minimal validation and does not block requests to private IP ranges or cloud metadata endpoints. An attacker who can control the API Request URL and has an API key can exploit this to make the server send requests to internal network resources and receive the responses directly. This enables attackers to access internal administrative endpoints, metadata services, and internal databases, leading to information disclosure and potential further attacks. The issue was fixed in version 1.7.0 by adding proper validation and blocking of such internal addresses. [1]

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Impact Analysis

This vulnerability can allow attackers to scan internal network assets and exfiltrate sensitive data from internal administrative endpoints, proxies, metrics dashboards, and management consoles. It also enables access to cloud metadata services, which can lead to theft of instance metadata and credentials. The SSRF can be used as a foothold for further attacks, including chaining to Remote Code Execution (RCE). Because the response is returned directly, attackers can immediately exploit the data. In multi-tenant environments, this can cause cross-tenant data leakage and high-impact breaches, while even single-tenant setups are at risk depending on internal network policies. [1]

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Detection Guidance

Detection can involve monitoring for unusual or unauthorized API calls to the vulnerable endpoints (/api/v1/run and /api/v1/run/advanced) that include URLs pointing to private IP ranges (127.0.0.1, 10.x.x.x, 172.x.x.x, 192.x.x.x) or cloud metadata endpoints (169.254.169.254). You can inspect logs for API requests containing such URLs. Additionally, testing with crafted API requests that attempt to access internal resources via the API Request component can confirm vulnerability. For example, using curl to invoke the flow execution endpoint with an API key and a flow containing an API Request node targeting an internal IP can reveal if SSRF is possible. Example command: curl -H "Authorization: Bearer <API_KEY>" -X POST -d '{"flow": {"nodes": [{"type": "API Request", "url": "http://127.0.0.1/admin"}]}}' https://<langflow-server>/api/v1/run/advanced/<FLOW_ID> [1]

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Mitigation Strategies

The immediate mitigation step is to upgrade Langflow to version 1.7.0 or later, where the vulnerability is patched by adding proper validation and blocking of private/internal IP ranges and cloud metadata endpoints. Until the upgrade, restrict access to the API endpoints (/api/v1/run and /api/v1/run/advanced) to trusted users only, and monitor for suspicious API usage. Network-level controls such as firewall rules blocking outgoing requests from the Langflow server to internal IP ranges and metadata endpoints can also reduce risk. [1]

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Compliance Impact

The vulnerability allows attackers to access and exfiltrate sensitive internal data, including administrative endpoints and cloud metadata services, which can lead to unauthorized disclosure of confidential information. Such data breaches can result in non-compliance with standards and regulations like GDPR and HIPAA that require protection of personal and sensitive data. Therefore, exploitation of this vulnerability could lead to violations of these compliance requirements due to unauthorized data access and potential data leakage. [1]

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