Compliance Impact

This vulnerability causes a Denial of Service (DoS) by exhausting memory and terminating the n8n process, which disrupts workflow availability. Disruption of service availability can impact compliance with standards and regulations such as GDPR and HIPAA, which require maintaining system availability and reliability to protect data processing and healthcare information systems.

However, the provided information does not explicitly state the direct effects on compliance with these standards or any specific regulatory requirements.

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Executive Summary

CVE-2026-54314 is a Denial of Service vulnerability in the n8n workflow automation platform affecting versions prior to 2.24.0.

The issue arises from the Compression node's Decompress operation, which expands attacker-controlled compressed archives into memory without enforcing limits on the decompressed output size.

An unauthenticated attacker can exploit this by sending a small compressed archive to a public webhook workflow using this node, causing the n8n process to terminate due to memory exhaustion.

This results in disruption of all workflows running on the same n8n instance.

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Impact Analysis

This vulnerability can cause a Denial of Service (DoS) condition by exhausting the memory of the n8n process.

As a result, the entire n8n instance will terminate, disrupting all workflows running on it.

This disruption can lead to downtime and loss of automation services, potentially impacting business operations that rely on these workflows.

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Detection Guidance

Detection of this vulnerability involves monitoring for unexpected termination of the n8n process or memory exhaustion events related to the Compression node's Decompress operation.

Since the vulnerability is triggered by an unauthenticated attacker sending a small compressed archive to a public webhook workflow, you can inspect network traffic for unusual or unexpected compressed archive payloads sent to n8n webhook endpoints.

Specific commands are not provided in the resources, but general approaches include:

• Using system monitoring tools (e.g., top, htop, or Windows Task Manager) to detect high memory usage or crashes of the n8n process.
• Checking n8n logs for errors or crashes related to the Compression node.
• Using network monitoring tools (e.g., tcpdump, Wireshark) to capture and analyze incoming requests to public webhook endpoints for suspicious compressed archive payloads.

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Mitigation Strategies

Immediate mitigation steps include upgrading n8n to version 2.24.0 or later, where the vulnerability is fixed by introducing configurable limits on decompressed output size and ZIP entry count.

If upgrading immediately is not possible, temporary mitigations include:

• Disabling the Compression node to prevent decompression of attacker-controlled archives.
• Restricting public webhook workflows to authenticated endpoints to prevent unauthenticated attackers from sending malicious compressed archives.

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