What is CVE-2026-42282?

CVE-2026-42282 is a medium-severity vulnerability in Czlonkowski N8n-mcp, classified under Insertion of Sensitive Information into Log File. CVSS score: 4.3/10. Published 2026-05-08.

How severe is CVE-2026-42282?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Information disclosure in Czlonkowski N8n-mcp

CVE-2026-42282

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to version 2.47.13, when n8n-mcp runs in HTTP transport mode, authenticated MCP tools/call requests had their full arg…

EPSS: 0.001 (19.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Czlonkowski N8n-mcp — versions < 2.47.13
N8n-mcp

Weakness classification (CWE)

CWE-532 — Insertion of Sensitive Information into Log File

References

security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (Product, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-42282?: CVE-2026-42282 is a medium-severity vulnerability in Czlonkowski N8n-mcp, classified under Insertion of Sensitive Information into Log File. CVSS score: 4.3/10. Published 2026-05-08.
How severe is CVE-2026-42282?: Medium severity. CVSS v3 base score is 4.3 out of 10.