CVE-2026-55608: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in czlonkowski n8n-mcp
A vulnerability in n8n-mcp prior to version 2.57.4 allows an authenticated tenant in multi-tenant HTTP mode to access workflow version backups outside their tenant scope. This exposure could reveal or allow deletion of workflow-version backups from previous single-tenant deployments or migrations. The issue is fixed in version 2.57.4.
AI Analysis
Technical Summary
CVE-2026-55608 describes an information exposure vulnerability in the n8n-mcp product by czlonkowski. When multi-tenant HTTP mode is enabled with ENABLE_MULTI_TENANT=true, authenticated tenants could access default-scope workflow_versions backups rather than being restricted to their own tenant scope. This flaw could lead to unauthorized access or deletion of workflow-version backups from prior single-tenant deployments or migrations. The vulnerability is resolved in version 2.57.4.
Potential Impact
The vulnerability allows low-privileged authenticated tenants to access or delete workflow-version backups beyond their authorized tenant scope. This results in exposure of sensitive workflow backup data and potential data loss. The CVSS score of 4.2 indicates a medium severity impact with limited confidentiality and integrity impact, no availability impact, and requiring network access with high attack complexity.
Mitigation Recommendations
Upgrade n8n-mcp to version 2.57.4 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is documented. Patch status is confirmed by the vendor advisory indicating the fix in 2.57.4.
CVE-2026-55608: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in czlonkowski n8n-mcp
Description
A vulnerability in n8n-mcp prior to version 2.57.4 allows an authenticated tenant in multi-tenant HTTP mode to access workflow version backups outside their tenant scope. This exposure could reveal or allow deletion of workflow-version backups from previous single-tenant deployments or migrations. The issue is fixed in version 2.57.4.
CVSS v3.1
Score 4.2medium
Affected software
pkg:github/czlonkowski/n8n-mcpRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-55608 describes an information exposure vulnerability in the n8n-mcp product by czlonkowski. When multi-tenant HTTP mode is enabled with ENABLE_MULTI_TENANT=true, authenticated tenants could access default-scope workflow_versions backups rather than being restricted to their own tenant scope. This flaw could lead to unauthorized access or deletion of workflow-version backups from prior single-tenant deployments or migrations. The vulnerability is resolved in version 2.57.4.
Potential Impact
The vulnerability allows low-privileged authenticated tenants to access or delete workflow-version backups beyond their authorized tenant scope. This results in exposure of sensitive workflow backup data and potential data loss. The CVSS score of 4.2 indicates a medium severity impact with limited confidentiality and integrity impact, no availability impact, and requiring network access with high attack complexity.
Mitigation Recommendations
Upgrade n8n-mcp to version 2.57.4 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is documented. Patch status is confirmed by the vendor advisory indicating the fix in 2.57.4.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-16T23:31:22.445Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a57f59668715ace437838dc
Added to database: 07/15/2026, 21:03:18 UTC
Last enriched: 07/15/2026, 21:18:14 UTC
Last updated: 07/16/2026, 00:11:15 UTC
Views: 27
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