CVE Explorer

CVE-2026-42449

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. In versions 2.47.4 through 2.47.13, the SDK embedder path (N8NDocumentationMCPServer constructor, getN8nApiClient(), and validateInstanceContext()), the synchronous URL validator in SSRFProtection.validateUrlSync() had no IPv6 checks. IPv4-mapped IPv6 addresses such as http://[::ffff:169.254.169.254] bypassed the cloud-metadata, localhost, and private-IP range checks. An attacker ab

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:81516e92f4d5dc4e074be5113de7d625e3e9b81e26a3c1ef4331ac0ab3d01949

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"n8n-mcp","vendor":"czlonkowski","versions":[{"status":"affected","version":">= 2.47.4, < 2.47.14"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:5950b9ef4367b323e374452c7daad3a426664dac223ea4db03300dac8118b57e · sha256:23148d0674c56210… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:5950b9ef4367b323e374452c7daad3a426664dac223ea4db03300dac8118b57e · sha256:23148d0674c56210… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:5950b9ef4367b323e374452c7daad3a426664dac223ea4db03300dac8118b57e · sha256:23148d0674c56210… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/czlonkowski/n8n-mcp/commit/9639f757853149f0cb16663cc8b6b6468f27a25f","tags":["x_refsource_MISC"],"url":"https://github.com/czlonkowski/n8n-mcp/commit/9639f757853149f0cb16663cc8b6b6468f27a25f"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:5950b9ef4367b323e374452c7daad3a426664dac223ea4db03300dac8118b57e · sha256:23148d0674c56210… · /containers/cna/references/1

{"name":"https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-56c3-vfp2-5qqj","tags":["x_refsource_CONFIRM"],"url":"https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-56c3-vfp2-5qqj"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:5950b9ef4367b323e374452c7daad3a426664dac223ea4db03300dac8118b57e · sha256:23148d0674c56210… · /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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