CVE-2026-87018

{
  "etk_id": "ETK-2026-2621",
  "cve_id": "CVE-2026-87018",
  "display_id": "CVE-2026-87018",
  "ghsa_id": "GHSA-qrxm-fqhp-jwvm",
  "euvd_id": "EUVD-2026-102318",
  "status": "published",
  "anchor_state": "anchored",
  "title": "TLS renegotiation denial of service in undici",
  "summary": "Affected undici versions can exit the Node.js process when connecting to a malicious or compromised HTTPS service that performs a TLS 1.2 renegotiation with a mismatched hostname certificate. An attacker must control, or be able to alter, an HTTPS endpoint used by undici or global fetch(); the resulting process termination can interrupt ongoing work.",
  "mitigation": "Upgrade undici to 6.29.1, 7.30.1, or 8.12.2, as appropriate for your release line. Until upgraded, require TLS 1.3 for outbound undici connections where destination compatibility permits.",
  "vendor": "nodejs",
  "product": "npm:undici",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 4.2.1, < 6.29.1"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "6.29.1"
      ],
      "package_name": "undici",
      "purl": "pkg:npm/undici"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 7.0.0, < 7.30.1"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "7.30.1"
      ],
      "package_name": "undici",
      "purl": "pkg:npm/undici"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 8.0.0, < 8.12.2"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "8.12.2"
      ],
      "package_name": "undici",
      "purl": "pkg:npm/undici"
    }
  ],
  "cwes": [
    248
  ],
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 14.80726165,
  "t0_at": "2026-10-15T18:38:25.613000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-15T18:38:25.613000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-15T18:38:25.613000+00:00",
      "url": "https://github.com/nodejs/undici/security/advisories/GHSA-qrxm-fqhp-jwvm"
    }
  }
}