undici v8.12.2 security fixes

{
  "id": "00fb909ed8ef917f0f08fcf53a8b8898199f951767d6076e7626abb5094d6f9b",
  "url": "https://github.com/nodejs/undici/releases/tag/v8.12.2",
  "method": "llm",
  "payload": {
    "kind": "patch",
    "title": "undici v8.12.2 security fixes",
    "summary": "undici v8.12.2 fixes multiple high- and medium-severity security issues, including denial of service, TLS certificate validation bypass, cache poisoning, cross-user disclosure, and integrity-check bypasses.",
    "evidence": "This release handles post-connect certificate errors without terminating the process.",
    "products": [
      {
        "name": {
          "value": "undici",
          "evidence": "Release notes from undici"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "v8.12.2",
            "evidence": "v8.12.2"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-87018",
        "evidence": "CVE-2026-87018"
      },
      {
        "value": "CVE-2026-109383",
        "evidence": "CVE-2026-109383"
      },
      {
        "value": "CVE-2026-109829",
        "evidence": "CVE-2026-109829"
      },
      {
        "value": "CVE-2026-109869",
        "evidence": "CVE-2026-109869"
      },
      {
        "value": "CVE-2026-87029",
        "evidence": "CVE-2026-87029"
      },
      {
        "value": "CVE-2026-109841",
        "evidence": "CVE-2026-109841"
      },
      {
        "value": "CVE-2026-109924",
        "evidence": "CVE-2026-109924"
      },
      {
        "value": "CVE-2026-109932",
        "evidence": "CVE-2026-109932"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "Security fixes High severity"
  },
  "source_id": "github-nodejs-undici",
  "document_id": 21934,
  "published_at": "2026-10-15T16:02:04+00:00"
}