Vulnerability in Czlonkowski N8n-mcp
CVE-2026-45582
n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.3, the workflow telemetry sanitizer could retain partial fragments of URL-shaped node parameters before sendin…
EPSS: 0.000 (10.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Czlonkowski N8n-mcp — versions < 2.51.3
- N8n-mcp
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-45582?
- CVE-2026-45582 is a medium-severity vulnerability in Czlonkowski N8n-mcp, classified under Insertion of Sensitive Information into Sent Data. CVSS score: 6.5/10. Published 2026-05-29.
- How severe is CVE-2026-45582?
- Medium severity. CVSS v3 base score is 6.5 out of 10.