CVE-2026-96581

{
  "etk_id": "ETK-2026-2632",
  "cve_id": "CVE-2026-96581",
  "display_id": "CVE-2026-96581",
  "ghsa_id": "GHSA-vw7c-67pf-gh96",
  "euvd_id": "EUVD-2026-109637",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Cross-tenant authorization bypass in Ash upserts",
  "summary": "Ash versions 1.22.0 through 3.37.1 can mishandle tenant boundaries when a create action performs an upsert. A tenant user may access, change, or take ownership of another tenant's record if attribute multitenancy is enabled and the relevant create action accepts record IDs for upserts.",
  "mitigation": "Upgrade ash to version 3.37.2. Until upgraded, disable upserts on create actions that accept client-controlled record identifiers, especially for tenant-scoped resources.",
  "vendor": "ash-project",
  "product": "ash",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.22.0, < 3.37.2"
      ],
      "ecosystem": "erlang",
      "fixed_versions": [
        "3.37.2"
      ],
      "package_name": "ash",
      "purl": "pkg:hex/ash"
    }
  ],
  "cwes": [
    639
  ],
  "cvss_score": 7.6,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 32.71309801666666,
  "t0_at": "2026-10-26T07:20:07.186000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-26T08:44:43.133206+00:00",
      "days": 0.058749388958333336,
      "is_lower_bound": false,
      "measured_at": "2026-10-26T07:20:07.186000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-26T07:20:07.186000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-26T07:20:07.186000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-96581"
    }
  }
}