{
  "id": 10632016,
  "title": "Official MCP Python SDK Flaw Can Let Malicious Servers Steal OAuth Credentials",
  "url": "https://urgent.news/2026/09/29/official-mcp-python-sdk-flaw-can-let-malicious-servers-steal-oauth",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-09-29T06:08:25.000Z",
  "source": {
    "name": "The Hacker News",
    "slug": "the-hacker-news",
    "url": "https://thehackernews.com/2026/09/official-mcp-python-sdk-flaw-can-let.html"
  },
  "original_language": "en",
  "account": null,
  "summary": "A malicious MCP server could trick an application built on the official MCP Python SDK into handing over the OAuth credentials it uses to log in to a real service, the SDK's maintainers said in a security advisory. Affected versions sent the client secret, the authorization code, and the PKCE proof key to a token endpoint the attacker controlled. The fix is in versions 1.30.0 and",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}