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CVE-2026-45707

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.2, when ENABLE_MULTI_TENANT=true, the HTTP transport documents that the target n8n instance is selected per-request from x-n8n-url / x-n8n-key headers. Requests that omitted those headers — or supplied only one of them — silently fell back to the process-level N8N_API_URL / N8N_API_KEY credentials configured for the operator's own n8n instance. As a result, an authenti
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2d159ffe94febb8fa63a99bdf4c510e9604a83e3b34f88b47cd0666d8d16c52f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"n8n-mcp","vendor":"czlonkowski","versions":[{"status":"affected","version":"< 2.51.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:743da94e06d64fedfdea7a0d8687d9e8b52bda31ba1a92f7c08f3fa7590a51a8 · sha256:f09c293c9fd49515… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:743da94e06d64fedfdea7a0d8687d9e8b52bda31ba1a92f7c08f3fa7590a51a8 · sha256:f09c293c9fd49515… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-284","description":"CWE-284: Improper Access Control","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:743da94e06d64fedfdea7a0d8687d9e8b52bda31ba1a92f7c08f3fa7590a51a8 · sha256:f09c293c9fd49515… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/czlonkowski/n8n-mcp/commit/853015d0897be7cf2d9d4726de195c938e4395ab","tags":["x_refsource_MISC"],"url":"https://github.com/czlonkowski/n8n-mcp/commit/853015d0897be7cf2d9d4726de195c938e4395ab"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:743da94e06d64fedfdea7a0d8687d9e8b52bda31ba1a92f7c08f3fa7590a51a8 · sha256:f09c293c9fd49515… · /containers/cna/references/1
{"name":"https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.2","tags":["x_refsource_MISC"],"url":"https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:743da94e06d64fedfdea7a0d8687d9e8b52bda31ba1a92f7c08f3fa7590a51a8 · sha256:f09c293c9fd49515… · /containers/cna/references/2
{"name":"https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-jxx9-px88-pj69","tags":["x_refsource_CONFIRM"],"url":"https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-jxx9-px88-pj69"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:743da94e06d64fedfdea7a0d8687d9e8b52bda31ba1a92f7c08f3fa7590a51a8 · sha256:f09c293c9fd49515… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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