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vuln-cve/data/2026/42xxx/CVE-2026-42230.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-42230",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-04-25T05:37:12.117Z",
"datePublished": "2026-05-04T18:28:43.069Z",
"dateUpdated": "2026-05-04T19:56:27.611Z"
},
"containers": {
"cna": {
"title": "n8n: Open Redirect in MCP OAuth Consent Flow",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-601",
"lang": "en",
"description": "CWE-601: URL Redirection to Untrusted Site ('Open Redirect')",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"userInteraction": "ACTIVE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 5.1,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N",
"version": "4.0"
}
}
],
"references": [
{
"name": "https://github.com/n8n-io/n8n/security/advisories/GHSA-f6x8-65q6-j9m9",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-f6x8-65q6-j9m9"
}
],
"affected": [
{
"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"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-05-04T18:28:43.069Z"
},
"descriptions": [
{
"lang": "en",
"value": "n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, the /mcp-oauth/register endpoint accepted OAuth client registrations without authentication, allowing arbitrary redirect_uri values to be registered. When a user denies the MCP OAuth consent dialog, the handleDeny handler redirects the user to the registered redirect_uri without validation, enabling an open redirect to an attacker-controlled URL. An attacker can craft a phishing link and send it to a victim; if the victim clicks \"Deny\" on the consent page, they are silently redirected to an external site. This issue has been patched in versions 1.123.32, 2.17.4, and 2.18.1."
}
],
"source": {
"advisory": "GHSA-f6x8-65q6-j9m9",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-05-04T19:55:49.415422Z",
"id": "CVE-2026-42230",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-05-04T19:56:27.611Z"
}
}
]
}
}