{
 "id": "AIR-2026-0137",
 "slug": "cve-2026-63127-rmcp-oauth-metadata-validation-flaw",
 "title": "CVE-2026-63127: RMCP OAuth metadata validation flaw",
 "summary": "An OAuth metadata validation flaw exists in the RMCP SDK for the Model Context Protocol prior to version 2.0.0. A malicious MCP server can exploit this to cause clients to connect to an unintended authorization server.",
 "type": "attack_on_ai",
 "categories": [
  "infra_vuln"
 ],
 "severity": 2,
 "targets": [
  "framework_or_tooling"
 ],
 "products": [
  "RMCP"
 ],
 "incident_date": "2026-09-16",
 "incident_date_precision": "day",
 "first_reported": "2026-09-16",
 "sources": [
  {
   "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63127",
   "publisher": "NVD",
   "title": "CVE-2026-63127: RMCP is an official Rust SDK for the Model Context Protocol.",
   "published_at": "2026-09-16"
  }
 ],
 "source_count": 1,
 "confidence": 0.95,
 "status": "published",
 "origin": "seed_nvd",
 "tags": [
  "CVE-2026-63127",
  "oauth",
  "mcp"
 ],
 "created_at": "2026-10-18T06:33:31.967Z",
 "updated_at": "2026-10-18T06:33:31.967Z"
}