ByteOS Network

NVD Vulnerability Details :

CVE-2026-45707

Undergoing Analysis

Source-security-advisories@github.com

Published At-29 May, 2026 | 14:16

Updated At-29 May, 2026 | 15:06

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 authenticated MCP tenant could cause n8n management calls to execute against the operator's instance instead of its own. This affects HTTP-mode deployments of n8n-mcp that are run as a shared multi-tenant service. Single-tenant deployments (ENABLE_MULTI_TENANT unset or false) are not affected. This vulnerability is fixed in 2.51.2.

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Secondary	3.1	8.1	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Type: Secondary

Version: 3.1

Base score: 8.1

Base severity: HIGH

Vector:

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Weaknesses

CWE ID	Type	Source
CWE-284	Primary	security-advisories@github.com

CWE ID: CWE-284

Type: Primary

Source: security-advisories@github.com

References

Hyperlink	Source	Resource
https://github.com/czlonkowski/n8n-mcp/commit/853015d0897be7cf2d9d4726de195c938e4395ab	security-advisories@github.com	N/A
https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.2	security-advisories@github.com	N/A
https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-jxx9-px88-pj69	security-advisories@github.com	N/A