CVE-2026-54314: CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) in n8n-io n8n
A vulnerability in n8n workflow automation platform prior to version 2.24.0 allows unauthenticated attackers to cause memory exhaustion by sending specially crafted compressed archives to the Compression node's Decompress operation. This occurs because the node expands attacker-controlled archives into memory without limiting decompressed output size, leading to process termination and disruption of workflows. The issue is fixed in version 2.24.0.
AI Analysis
Technical Summary
CVE-2026-54314 describes an improper handling of highly compressed data (CWE-409) in the n8n open source workflow automation platform. Specifically, in versions before 2.24.0, the Compression node's Decompress operation does not enforce limits on the size of decompressed output when processing attacker-controlled archives. An unauthenticated attacker can exploit this by sending a small compressed archive to a public webhook workflow using this node, causing excessive memory consumption, process termination, and disruption of all workflows running in the same instance. This vulnerability has a CVSS 4.0 score of 6.3 (medium severity) and is fixed in n8n version 2.24.0.
Potential Impact
An unauthenticated attacker can cause a denial of service by sending a crafted compressed archive that expands in memory beyond safe limits, exhausting system memory and terminating the n8n process. This disrupts all workflows running in the affected n8n instance, impacting availability.
Mitigation Recommendations
Upgrade to n8n version 2.24.0 or later, where this vulnerability is fixed by enforcing limits on decompressed output size in the Compression node's Decompress operation. No other mitigation or workaround is indicated in the available data.
CVE-2026-54314: CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) in n8n-io n8n
Description
A vulnerability in n8n workflow automation platform prior to version 2.24.0 allows unauthenticated attackers to cause memory exhaustion by sending specially crafted compressed archives to the Compression node's Decompress operation. This occurs because the node expands attacker-controlled archives into memory without limiting decompressed output size, leading to process termination and disruption of workflows. The issue is fixed in version 2.24.0.
CVSS v4.0
Score 6.3medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-54314 describes an improper handling of highly compressed data (CWE-409) in the n8n open source workflow automation platform. Specifically, in versions before 2.24.0, the Compression node's Decompress operation does not enforce limits on the size of decompressed output when processing attacker-controlled archives. An unauthenticated attacker can exploit this by sending a small compressed archive to a public webhook workflow using this node, causing excessive memory consumption, process termination, and disruption of all workflows running in the same instance. This vulnerability has a CVSS 4.0 score of 6.3 (medium severity) and is fixed in n8n version 2.24.0.
Potential Impact
An unauthenticated attacker can cause a denial of service by sending a crafted compressed archive that expands in memory beyond safe limits, exhausting system memory and terminating the n8n process. This disrupts all workflows running in the affected n8n instance, impacting availability.
Mitigation Recommendations
Upgrade to n8n version 2.24.0 or later, where this vulnerability is fixed by enforcing limits on decompressed output size in the Compression node's Decompress operation. No other mitigation or workaround is indicated in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-12T18:42:02.223Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3aafb1eed863c81e44dd71
Added to database: 06/23/2026, 16:09:21 UTC
Last enriched: 06/23/2026, 16:24:54 UTC
Last updated: 06/23/2026, 16:29:03 UTC
Views: 2
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