| Reporter | Title | Published | Views | Family All 17 |
|---|---|---|---|---|
 | CVE-2026-42236 | 4 May 202618:38 | – | attackerkb |
 | N8n MCP Client Registration DoS | 18 May 202600:00 | – | bdu_fstec |
 | CVE-2026-42236 | 4 May 202620:56 | – | circl |
 | n8n security vulnerabilities | 4 May 202600:00 | – | cnnvd |
 | CVE-2026-42236 n8n: Unauthenticated Denial of Service via MCP Client Registration | 4 May 202618:38 | – | cvelist |
 | EUVD-2026-27111 | 4 May 202618:38 | – | euvd |
 | n8n Vulnerable to Unauthenticated Denial of Service via MCP Client Registration | 29 Apr 202621:19 | – | github |
 | CVE-2026-42236 | 4 May 202618:38 | – | mend |
 | CVE-2026-42236 | 4 May 202619:16 | – | nvd |
 | GHSA-49M9-PGWW-9VQ6 n8n Vulnerable to Unauthenticated Denial of Service via MCP Client Registration | 29 Apr 202621:19 | – | osv_ghsa |
10
[
{
"vendor": "n8n-io",
"product": "n8n",
"versions": [
{
"version": "< 1.123.32",
"status": "affected"
},
{
"version": ">= 2.17.0, < 2.17.4",
"status": "affected"
},
{
"version": ">= 2.18.0, < 2.18.1",
"status": "affected"
}
]
}
]| Parameter | Position | Path | Description | CWE |
|---|---|---|---|---|
| registration payload | request body | /mcp/oauth/register | Unauthenticated MCP OAuth client registration endpoint allows an attacker to send large payloads to exhaust server memory resources. | CWE-770 |
Data
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17 Jun 2026 10:47Current
6.9Medium risk
Vulners AI Score6.9
CVSS 3.17.5
CVSS 48.7
EPSS0.00651
SSVC