CVE-2026-54052

CRITICALPre-NVD 9.99.9
EchelonGraph scoreLOW confidence

This critical-severity CVE scores 9.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: secondary
9.9
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: —CVSS: 9.9Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 node definitions, credential references, and authorization headers. This issue is fixed in version 2.56.1.

CVSS v3
9.9
EG Score
9.9(low)
EPSS
—
KEV
Not listed

Published

July 14, 2026

Last Modified

July 15, 2026

Advisory Details (2)

Auto-updated Jul 16, 2026
Patch available. Sources: github_release, github.
github Patch Available

Cross-tenant access to workflow version backups in multi-tenant HTTP deployments · Advisory · czlonkowski/n8n-mcp · GitHub

https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-j6r7-6fhx-77wx
github_release Patch Available

Release v2.56.1

Patch available: czlonkowski/n8n-mcp v2.56.1

https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.56.1

Vendor Advisories for CVE-2026-54052(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 9× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-16 02:10 UTCEG score recompute
  2. 2026-07-15 22:18 UTCEG score recompute
  3. 2026-07-15 18:26 UTCEG score recompute
  4. 2026-07-15 14:32 UTCEG score recompute
  5. 2026-07-15 10:40 UTCEG score recompute
  6. 2026-07-15 06:48 UTCEG score recompute
  7. 2026-07-15 02:55 UTCEG score recompute
  8. 2026-07-14 23:03 UTCEG score recompute
  9. 2026-07-14 19:10 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2026-54052?
CVE-2026-54052 is a critical vulnerability published on July 14, 2026. 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 ENABLEMULTITENANT=true, n8n-mcp's local workflow version history backups were not isolated per tenant, allowing an…
When was CVE-2026-54052 disclosed?
CVE-2026-54052 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-54052?
CVE-2026-54052 has a CVSS v3 base score of 9.9 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-54052?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54052, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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