Is n8n-mcp affected by CVE-2026-42449?

npm n8n-mcp is affected in >=2.47.4 <2.47.14.

Is CVE-2026-42449 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

high

CVE-2026-42449

Q: Is CVE-2026-42449 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

npm · n8n-mcp

Summary

n8n-mcp's IPv4-mapped IPv6 addresses bypass SSRF protection in validateUrlSync(), enabling full SSRF for SDK embedders

Severity: high
EPSS: 0.2% (p10)
Also known as: GHSA-56c3-vfp2-5qqj
Published: 2026-04-30

References

https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-56c3-vfp2-5qqj
https://nvd.nist.gov/vuln/detail/CVE-2026-42449
https://github.com/czlonkowski/n8n-mcp/commit/9639f757853149f0cb16663cc8b6b6468f27a25f

Related advisories

CVE-2026-45707 — high · npm/n8n-mcp
GHSA-8g7g-hmwm-6rv2 — high · npm/n8n-mcp
CVE-2026-44694 — high · npm/n8n-mcp
GHSA-75hx-xj24-mqrw — high · npm/n8n-mcp
CVE-2026-39974 — high · npm/n8n-mcp
CVE-2026-45582 — medium · npm/n8n-mcp
CVE-2026-42282 — medium · npm/n8n-mcp
CVE-2026-41495 — medium · npm/n8n-mcp

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.