TCP Socket Connection Bypass in NocoDB

Compliance Impact

The vulnerability CVE-2026-47382 is a Server-Side Request Forgery (SSRF) issue that could allow authenticated users to probe internal services and databases without proper validation. This could potentially expose sensitive internal resources or data.

Such unauthorized access or exposure of internal systems may lead to non-compliance with data protection regulations like GDPR or HIPAA, which require strict controls over access to sensitive data and internal networks.

However, the provided information does not explicitly state the direct impact on compliance with these standards.

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Executive Summary

The vulnerability in NocoDB prior to version 2026.05.1 involves the connection-test endpoint opening a raw TCP socket to a user-supplied database host without properly resolving or range-checking the destination address.

This means that private and link-local IP addresses, including IPv4-mapped IPv6 forms and localhost addresses, could be reached by the driver, potentially allowing unintended access to internal or restricted network resources.

The issue was fixed in version 2026.05.1 by adding proper checks to prevent such connections.

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Impact Analysis

This vulnerability could allow an attacker or user to connect to internal or private network addresses that should not be accessible, potentially exposing sensitive internal services or data.

By reaching private or link-local addresses through the connection-test endpoint, unauthorized access or information disclosure could occur, increasing the risk of network reconnaissance or exploitation of internal systems.

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Mitigation Strategies

To mitigate this vulnerability, update NocoDB to version 2026.05.1 or later, where the issue with the connection-test endpoint has been fixed.

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Detection Guidance

This vulnerability can be detected by monitoring and testing the connection-test endpoint in NocoDB versions prior to 2026.05.1 for unauthorized or unexpected raw TCP socket connections to internal or private IP addresses.

To detect potential exploitation, you can check network traffic or logs for connection attempts from NocoDB to private, loopback, or link-local IP ranges.

Suggested commands include using network monitoring tools like tcpdump or netstat to observe outgoing connections from the NocoDB server.

• Use tcpdump to capture outgoing TCP connections from the NocoDB server: sudo tcpdump -i <interface> tcp and src host <nocodb-server-ip>
• Use netstat or ss to list current TCP connections and check for connections to private IP ranges: netstat -tnp | grep nocodb or ss -tnp | grep nocodb
• Check application logs for connection-test endpoint usage or unusual database host connection attempts.

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