{
 "id": "AIR-2026-0251",
 "slug": "mcp-typescript-sdk-oauth-client-credential-exposure-vulnerab",
 "title": "MCP TypeScript SDK OAuth Client Credential Exposure Vulnerability",
 "summary": "An OAuth client flaw in the MCP TypeScript SDK allowed a compromised MCP server to direct OAuth credentials to an arbitrary authorization server. Users were advised to update their applications to secure the SDK.",
 "type": "attack_on_ai",
 "categories": [
  "infra_vuln"
 ],
 "severity": 2,
 "targets": [
  "framework_or_tooling"
 ],
 "products": [
  "MCP TypeScript SDK"
 ],
 "incident_date": "2026-10-06",
 "incident_date_precision": "day",
 "first_reported": "2026-10-06",
 "sources": [
  {
   "url": "https://github.com/advisories/GHSA-6qxp-vccf-f47h",
   "publisher": "GitHub Advisory Database",
   "title": "CVE-2026-104850: MCP TypeScript SDK: OAuth client could send credentials to an authorization server chosen by the MCP server",
   "published_at": "2026-10-06"
  },
  {
   "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-104850",
   "publisher": "NVD",
   "title": "CVE-2026-104850: MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients.",
   "published_at": "2026-10-06"
  }
 ],
 "source_count": 2,
 "confidence": 0.95,
 "status": "published",
 "origin": "seed_ghsa",
 "tags": [
  "CVE-2026-104850",
  "mcp",
  "oauth"
 ],
 "created_at": "2026-10-18T06:33:31.967Z",
 "updated_at": "2026-10-18T06:33:31.967Z"
}