{
 "id": "AIR-2026-0425",
 "slug": "cve-2026-0621-anthropic-s-mcp-typescript-sdk-has-a-redos-vul",
 "title": "CVE-2026-0621: Anthropic's MCP TypeScript SDK has a ReDoS vulnerability",
 "summary": "A regular expression denial of service vulnerability exists in the UriTemplate class of Anthropic's Model Context Protocol TypeScript SDK. Crafted requests can cause 100% CPU utilization and server crashes.",
 "type": "attack_on_ai",
 "categories": [
  "infra_vuln"
 ],
 "severity": 2,
 "targets": [
  "framework_or_tooling"
 ],
 "products": [
  "MCP TypeScript SDK"
 ],
 "incident_date": "2026-01-05",
 "incident_date_precision": "day",
 "first_reported": "2026-01-05",
 "sources": [
  {
   "url": "https://github.com/advisories/GHSA-8r9q-7v3j-jr4g",
   "publisher": "GitHub Advisory Database",
   "title": "CVE-2026-0621: Anthropic's MCP TypeScript SDK has a ReDoS vulnerability",
   "published_at": "2026-01-05"
  }
 ],
 "source_count": 1,
 "confidence": 0.95,
 "status": "published",
 "origin": "seed_ghsa",
 "tags": [
  "CVE-2026-0621",
  "mcp",
  "anthropic",
  "redos"
 ],
 "created_at": "2026-10-18T07:00:14.101Z",
 "updated_at": "2026-10-18T07:00:14.101Z"
}