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CVE-2026-55608

n8n-MCP: Incorrect authorization can expose default-scope workflow version backups in multi-tenant HTTP mode

Published: Jul 15, 2026Updated: Jul 17, 2026 Sources: CVE List NVDCWE-200
4.2MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 94.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.57.4, multi-tenant HTTP mode with ENABLE_MULTI_TENANT=true could allow an authenticated tenant to access default-scope workflow_versions backups instead of being confined to the tenant scope, exposing or deleting workflow-version backups from prior single-tenant deployments or migrations. This issue is fixed in version 2.57.4.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:LUI:NS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-200CWE-863

Affected Products

czlonkowski
oss-project
n8n-mcpMixed
DevTools & CI / ci-cd
n8n-mcp
oss-project
n8n-mcpMixed
AI / ML / ai-agent-tooling

Exploitability

Official Patch Available
Workaround Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

3 techniques
Collection
Initial Access
View detailed technique mapping

References

https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-2cf7-hpwf-47h9
github.com
https://github.com/czlonkowski/n8n-mcp/commit/1f42899749ed0c584fb6b4fd63d75233c3edee59
github.com
https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.57.4
github.com

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