{
 "id": "AIR-2026-0454",
 "slug": "cve-2026-25536-model-context-protocol-sdk-cross-client-data",
 "title": "CVE-2026-25536: Model Context Protocol SDK cross-client data leak",
 "summary": "A cross-client data leak vulnerability in the Model Context Protocol SDK stems from reusing server or transport instances across requests. Developers are urged to update their SDK packages.",
 "type": "attack_on_ai",
 "categories": [
  "infra_vuln",
  "data_leak"
 ],
 "severity": 2,
 "targets": [
  "framework_or_tooling"
 ],
 "products": [
  "@modelcontextprotocol/sdk"
 ],
 "incident_date": "2026-02-04",
 "incident_date_precision": "day",
 "first_reported": "2026-02-04",
 "sources": [
  {
   "url": "https://github.com/advisories/GHSA-345p-7cg4-v4c7",
   "publisher": "GitHub Advisory Database",
   "title": "CVE-2026-25536: @modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse",
   "published_at": "2026-02-04"
  },
  {
   "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25536",
   "publisher": "NVD",
   "title": "CVE-2026-25536: MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients.",
   "published_at": "2026-02-04"
  }
 ],
 "source_count": 2,
 "confidence": 0.95,
 "status": "published",
 "origin": "seed_ghsa",
 "tags": [
  "CVE-2026-25536",
  "mcp",
  "data_leak"
 ],
 "created_at": "2026-10-18T07:00:14.101Z",
 "updated_at": "2026-10-18T10:04:21.885Z"
}