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.
CVE-2026-55608
MEDIUMPre-NVD 4.24.2
EchelonGraph scoreLOW confidence
This medium-severity CVE scores 4.2 under the CNA's CVSS (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: cna:github_m
4.2
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: —CVSS: 4.2Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 4.2
- EG Score
- 4.2(low)
- EPSS
- —
- KEV
- Not listed
Published
July 14, 2026
Last Modified
July 15, 2026
Advisory Details (3)
Auto-updated Jul 16, 2026Patch available. Sources: github_commit, github_release, github.
github Patch Available
Incorrect authorization can expose default-scope workflow version backups in multi-tenant HTTP mode · Advisory · czlonkowski/n8n-mcp · GitHub
https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-2cf7-hpwf-47h9github_release Patch Available
Release v2.57.4
Patch available: czlonkowski/n8n-mcp v2.57.4
https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.57.4github_commit Patch Available
commit 1f42899749ed (czlonkowski/n8n-mcp)
Patch available: czlonkowski/n8n-mcp v2.57.4 (contains commit 1f42899749ed)
https://github.com/czlonkowski/n8n-mcp/commit/1f42899749ed0c584fb6b4fd63d75233c3edee59Vendor Advisories for CVE-2026-55608(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 2× in last 7d / 2× 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.
- 2026-07-15 21:29 UTCEG score recompute
- 2026-07-14 20:56 UTCEG score recompute
Related CVEs(same CWE)
Same CWE
10 shownCWE-863 · CWE-200
Frequently asked(4)
What is CVE-2026-55608?
CVE-2026-55608 is a medium 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 2.57.4, multi-tenant HTTP mode with ENABLEMULTITENANT=true could allow an authenticated tenant to access default-scope workflow_versions backups instead of being confined to…
When was CVE-2026-55608 disclosed?
CVE-2026-55608 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-2026-55608?
CVE-2026-55608 has a CVSS v3 base score of 4.2 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-55608?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55608, 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
Explore the affected products and dependency analysis for CVE-2026-55608
Is Your Infrastructure Affected by CVE-2026-55608?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.