{
 "id": "AIR-2026-0805",
 "slug": "cve-2026-52870-mcp-python-sdk-experimental-task-handlers-all",
 "title": "CVE-2026-52870: MCP Python SDK experimental task handlers allow unauthorized task access",
 "summary": "An authorization vulnerability in the MCP Python SDK experimental tasks feature allows connected clients to observe, read results from, and cancel tasks belonging to other clients. A patch has been issued for affected library versions.",
 "type": "attack_on_ai",
 "categories": [
  "infra_vuln"
 ],
 "severity": 2,
 "targets": [
  "framework_or_tooling"
 ],
 "products": [
  "MCP Python SDK"
 ],
 "incident_date": "2026-07-16",
 "incident_date_precision": "day",
 "first_reported": "2026-07-15",
 "sources": [
  {
   "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52870",
   "publisher": "NVD",
   "title": "CVE-2026-52870: The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol (MCP).",
   "published_at": "2026-07-15"
  },
  {
   "url": "https://github.com/advisories/GHSA-hvrp-rf83-w775",
   "publisher": "GitHub Advisory Database",
   "title": "CVE-2026-52870: MCP Python SDK: Experimental task handlers allow any client to access and cancel other clients' tasks",
   "published_at": "2026-07-16"
  }
 ],
 "source_count": 2,
 "confidence": 0.95,
 "status": "published",
 "origin": "seed_ghsa",
 "tags": [
  "CVE-2026-52870",
  "mcp",
  "authorization"
 ],
 "created_at": "2026-10-18T07:00:14.101Z",
 "updated_at": "2026-10-18T10:04:21.885Z"
}