High
n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths
Type: advisorySources: OSV
n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. From version 2.18.7 to before version 2.50.2, there is an authenticated server-side request forgery vulnerability affecting the webhook trigger tools, the n8n API client (N8N_API_URL), and per-request URLs supplied via the x-n8n-url header in multi-tenant HTTP mode. This issue has been patched in version 2.50.2.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-44694
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 02:05 UTC · Revision 1
Source evidence
n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths
core-osv · Original sourcePublished 8 May 2026, 19:12 UTC
n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. From version 2.18.7 to before version 2.50.2, there is an authenticated server-side request forgery vulnerability affecting the webhook trigger tools, the n8n API client (N8N_API_URL), and per-request URLs supplied via the x-n8n-url header in multi-tenant HTTP mode. This issue has been patched in version 2.50.2.
osv:CVE-2026-44694
Complete source record
{
"id": "406380cbfce02581e167b1121bb89577226c7c327db1794b945afb30c44778da",
"url": "https://osv.dev/vulnerability/CVE-2026-44694",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths",
"summary": "n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. From version 2.18.7 to before version 2.50.2, there is an authenticated server-side request forgery vulnerability affecting the webhook trigger tools, the n8n API client (N8N_API_URL), and per-request URLs supplied via the x-n8n-url header in multi-tenant HTTP mode. This issue has been patched in version 2.50.2.",
"evidence": "osv:CVE-2026-44694",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-44694",
"aliases": [
"CVE-2026-44694",
"GHSA-cmrh-wvq6-wm9r"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/czlonkowski/n8n-mcp",
"type": "GIT",
"events": [
{
"introduced": "dc62fd66cbc58a518b2a5a3ace3902b0f87fdaa4"
},
{
"fixed": "bcaba839409d470abeb4a6ad9b361b553a1098eb"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "2.18.7"
},
{
"fixed": "2.50.2"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "bcaba839409d470abeb4a6ad9b361b553a1098eb"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "bcaba839409d470abeb4a6ad9b361b553a1098eb"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v2.50.2"
},
{
"cpe": "cpe:2.3:a:n8n-mcp:n8n-mcp:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.18.7"
},
{
"fixed": "2.50.2"
}
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"source": "CPE_RANGE"
}
]
}
}
],
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44694.json"
}
}
],
"modified": "2026-10-28T02:30:32.331414737Z",
"provider": "osv",
"references": [
"https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.50.2",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44694.json",
"https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-cmrh-wvq6-wm9r",
"https://nvd.nist.gov/vuln/detail/CVE-2026-44694",
"https://github.com/czlonkowski/n8n-mcp/commit/bcaba839409d470abeb4a6ad9b361b553a1098eb"
],
"provider_metadata": {
"cwe_ids": [
"CWE-367",
"CWE-918"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44694.json"
}
},
"related_cves": [
{
"value": "CVE-2026-44694",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 499539,
"published_at": "2026-05-08T19:12:05.326+00:00"
}