CVE-2026-109829

{
  "etk_id": "ETK-2026-2624",
  "cve_id": "CVE-2026-109829",
  "display_id": "CVE-2026-109829",
  "ghsa_id": "GHSA-4w7w-5xrc-9h26",
  "euvd_id": "EUVD-2026-102309",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Cross-origin redirect cache poisoning in undici",
  "summary": "Undici can associate a response reached through a cross-origin redirect with the original URL in a shared cache. An attacker controlling a redirect destination could poison cached content or expose a prior user's data when an originless Agent uses a shared cache store with redirect processing before caching.",
  "mitigation": "Upgrade undici to 7.30.1 or 8.12.2, or a later compatible release. Until upgraded, place caching before redirect handling, use separate per-origin caches and dispatchers, or disable shared caching for requests that can follow redirects.",
  "vendor": "nodejs",
  "product": "npm:undici",
  "affected": [
    {
      "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": [
    346
  ],
  "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": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 9.457194066666666,
  "t0_at": "2026-10-15T18:28:04.954000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-15T18:28:04.954000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-15T18:28:04.954000+00:00",
      "url": "https://github.com/nodejs/undici/security/advisories/GHSA-4w7w-5xrc-9h26"
    }
  }
}