CVE-2026-109383

{
  "etk_id": "ETK-2026-2625",
  "cve_id": "CVE-2026-109383",
  "display_id": "CVE-2026-109383",
  "ghsa_id": "GHSA-2m5v-pch6-74hx",
  "euvd_id": "EUVD-2026-102314",
  "status": "published",
  "anchor_state": "anchored",
  "title": "TLS certificate validation bypass in undici Agent",
  "summary": "Affected undici releases can omit custom TLS certificate-verification callbacks when requests use Agent, including the default dispatcher path. A peer rejected by application-specific validation may be accepted if it passes Node.js default certificate and hostname checks. Exposure requires an application to provide a function-valued tls option, such as certificate or public-key pinning.",
  "mitigation": "Upgrade undici to 6.29.1, 7.30.1, 8.12.2, or a later applicable release. Until upgraded, supply TLS options through connect rather than tls; for proxied destinations, use requestTls and proxyTls.",
  "vendor": "nodejs",
  "product": "npm:undici",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 4.0.0, < 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": [
    295
  ],
  "cvss_score": 7.4,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 8.9818957,
  "t0_at": "2026-10-15T18:34:01.468000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-26T04:31:08.195561+00:00",
      "days": 10.414661198622685,
      "is_lower_bound": false,
      "measured_at": "2026-10-15T18:34:01.468000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-15T18:34:01.468000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-15T18:34:01.468000+00:00",
      "url": "https://github.com/nodejs/undici/security/advisories/GHSA-2m5v-pch6-74hx"
    }
  }
}