CVE-2026-54052: n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operati

Q: How do I fix CVE-2026-54052?

n8n-mcp: upgrade to 2.56.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-54052 being exploited?

CVE-2026-54052 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-54052 affect?

CVE-2026-54052 affects n8n-mcp. Severity is critical (CVSS 9.9). n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.56.1, in HTTP mode with multi-tenancy enabled through ENABLE_MULTI_TENANT=true, n8n-mcp's local workflow version h

Q: How urgent is CVE-2026-54052?

Priority 43/100. Critical severity

This month

CRITICAL 9.9UPGRADE

CVE-2026-54052 is a critical-severity flaw (CVSS 9.9) affecting n8n-mcp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.56.1, in HTTP mode with multi-tenancy enabled through ENABLE_MULTI_TENANT=true, n8n-mcp's local workflow version history backups were not isolated per tenant, allowing an authenticated tenant to read workflow version snapshots belonging to other tenants and delete or destroy other tenants' stored backups, including full no

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-639, CWE-862
Published	2026-07-15
Last modified	2026-10-24

Publisher (CNA): GitHub, Inc. · Vendor: n8n-mcp

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-15 21:16 UTCPublished CVE record published
2026-10-24 21:10 UTCUpdated Record last modified

n8n-mcp n8n-mcp UPGRADE

Affected: < 2.56.1

Fixed in: 2.56.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy n8n-mcp || rpm -q n8n-mcp || n8n-mcp --version

2. UPGRADE to 2.56.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade n8n-mcp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade n8n-mcp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-54052?

n8n-mcp: upgrade to 2.56.1. Exact commands for each OS are on this page.

Is CVE-2026-54052 being exploited?

CVE-2026-54052 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-54052 affect?

CVE-2026-54052 affects n8n-mcp. Severity is critical (CVSS 9.9). n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.56.1, in HTTP mode with multi-tenancy enabled through ENABLE_MULTI_TENANT=true, n8n-mcp's local workflow version h

How urgent is CVE-2026-54052?

Priority 43/100. Critical severity

Related CVEs

CVE-2026-55608 MEDIUM 4.2 UPGRADE n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operati

References

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