{
 "id": "AIR-2026-1293",
 "slug": "cve-2026-53965-mcp-php-sdk-unbounded-memory-buffer-vulnerabi",
 "title": "CVE-2026-53965: MCP PHP SDK unbounded memory buffer vulnerability",
 "summary": "The Model Context Protocol PHP SDK has an unbounded memory buffer vulnerability in its HTTP client transport during SSE stream processing. A malicious server can cause unlimited memory growth leading to a denial of service.",
 "type": "attack_on_ai",
 "categories": [
  "infra_vuln"
 ],
 "severity": 2,
 "targets": [
  "framework_or_tooling"
 ],
 "products": [
  "MCP PHP SDK"
 ],
 "incident_date": "2026-08-25",
 "incident_date_precision": "day",
 "first_reported": "2026-08-25",
 "sources": [
  {
   "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53965",
   "publisher": "NVD",
   "title": "CVE-2026-53965: The MCP PHP SDK (Composer package mcp/sdk) is the official Model Context Protocol SDK for PHP.",
   "published_at": "2026-08-25"
  }
 ],
 "source_count": 1,
 "confidence": 0.95,
 "status": "published",
 "origin": "seed_nvd",
 "tags": [
  "CVE-2026-53965",
  "mcp",
  "infra_vuln"
 ],
 "created_at": "2026-10-18T10:04:21.885Z",
 "updated_at": "2026-10-18T10:04:21.885Z"
}