CVE-2026-45707
- Source
- https://cve.org/CVERecord?id=CVE-2026-45707
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45707.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-45707
- Aliases
- Published
- 2026-05-29T13:35:42.281Z
- Modified
- 2026-07-08T08:05:17.292160106Z
- Severity
-
- 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- n8n-MCP: Multi-tenant MCP requests fall back to process-level n8n credentials when tenant headers are absent or incomplete
- Details
-
n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.2, when ENABLEMULTITENANT=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 N8NAPIURL / N8NAPIKEY 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 (ENABLEMULTITENANT unset or false) are not affected. This vulnerability is fixed in 2.51.2.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45707.json", "cwe_ids": [ "CWE-284" ], "cna_assigner": "GitHub_M" }- References
-
- https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.2
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45707.json
- https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-jxx9-px88-pj69
- https://nvd.nist.gov/vuln/detail/CVE-2026-45707
- https://github.com/czlonkowski/n8n-mcp/commit/853015d0897be7cf2d9d4726de195c938e4395ab
Affected packages
Git / github.com/czlonkowski/n8n-mcp
Affected ranges
- Type
- GIT
- Repo
- https://github.com/czlonkowski/n8n-mcp
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
{ "source": [ "AFFECTED_FIELD", "CPE_RANGE", "REFERENCES" ], "cpe": "cpe:2.3:a:n8n-mcp:n8n-mcp:*:*:*:*:*:*:*:*", "extracted_events": [ { "introduced": "0" }, { "fixed": "2.51.2" } ] }