{
 "id": "AIR-2026-0536",
 "slug": "cve-2026-27124-fastmcp-oauth-proxy-lacks-consent-verificatio",
 "title": "CVE-2026-27124: FastMCP OAuth Proxy Lacks Consent Verification",
 "summary": "A missing consent verification flaw in FastMCP's OAuth Proxy callback facilitates confused deputy vulnerabilities. The issue arises when combining previously authorized OAuth clients with unvalidated authorization codes.",
 "type": "attack_on_ai",
 "categories": [
  "infra_vuln"
 ],
 "severity": 2,
 "targets": [
  "framework_or_tooling"
 ],
 "products": [
  "FastMCP"
 ],
 "incident_date": "2026-03-31",
 "incident_date_precision": "day",
 "first_reported": "2026-03-31",
 "sources": [
  {
   "url": "https://github.com/advisories/GHSA-rww4-4w9c-7733",
   "publisher": "GitHub Advisory Database",
   "title": "CVE-2026-27124: FastMCP: Missing Consent Verification in OAuth Proxy Callback Facilitates Confused Deputy Vulnerabilities",
   "published_at": "2026-03-31"
  }
 ],
 "source_count": 1,
 "confidence": 0.95,
 "status": "published",
 "origin": "seed_ghsa",
 "tags": [
  "CVE-2026-27124",
  "confused-deputy"
 ],
 "created_at": "2026-10-18T07:00:14.101Z",
 "updated_at": "2026-10-18T07:00:14.101Z"
}