Tornado 6.5.8 security fixes

{
  "id": "6a7313a96c78d64ce50396f807e20b702e36f1e99de6d0db0bfcdae9c3b214a2",
  "url": "https://github.com/tornadoweb/tornado/releases/tag/v6.5.8",
  "method": "llm",
  "payload": {
    "kind": "patch",
    "title": "Tornado 6.5.8 security fixes",
    "summary": "Tornado 6.5.8 adds limits to form-encoded POST arguments and multipart parts to reduce denial-of-service risks, and applies invalid-character restrictions to deprecated mixed-case cookie arguments.",
    "evidence": "v6.5.8: What's new in Tornado 6.5.8\n\nAug 6, 2026 Security fixes - Form-encoded ``POST`` bodies are now subject to a limit of 1000 arguments by default. This prevents a CPU and memory denial of service attack.",
    "products": [
      {
        "name": {
          "value": "Tornado",
          "evidence": "What's new in Tornado 6.5.8"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.5.8",
            "evidence": "v6.5.8: What's new in Tornado 6.5.8"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "github-tornadoweb-tornado",
  "document_id": 22764,
  "published_at": "2026-08-07T01:56:30+00:00"
}