{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6eddb8ab26e45023faf0c79ebd152bb40aefda02"
            }
          ],
          "repo": "https://github.com/ash-project/ash",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-4259-gvr2-4xhq"
  ],
  "database_specific": {
    "cna_assigner": "EEF",
    "cwe_ids": [
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82747.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "3.4.44"
          },
          {
            "fixed": "3.32.2"
          },
          {
            "introduced": "f4a8ff53fd3b974468d73685cd3fc842ef893de3"
          },
          {
            "fixed": "6eddb8ab26e45023faf0c79ebd152bb40aefda02"
          }
        ],
        "source": "AFFECTED_FIELD"
      },
      {
        "extracted_events": [
          {
            "introduced": "3.4.44"
          },
          {
            "fixed": "3.32.2"
          }
        ],
        "source": "CPE_FIELD"
      },
      {
        "extracted_events": [
          {
            "introduced": "3.4.44"
          },
          {
            "fixed": "3.32.2"
          }
        ],
        "source": "DESCRIPTION"
      }
    ]
  },
  "details": "Incorrect Authorization vulnerability in ash-project ash returns records that a runtime read policy denies to any actor.\n\nWhen a resource has an access_type :runtime read policy (a check evaluated per record rather than compiled to a filter), Ash.Policy.Authorizer decides each record in check_result/1 (lib/ash/policy/authorizer/authorizer.ex) by discarding impossible policy scenarios and inspecting what remains. When every scenario for a record was impossible, meaning no policy can authorize it and it must be forbidden, the empty-scenario branch instead kept the record ({[record | data], authorizer, any_forbidden?}) and returned it as authorized. As a result, records the runtime read policy denies are returned to any actor. The fix forbids a record whose scenarios are all impossible.\n\nThis issue affects ash: from 3.4.44 before 3.32.2.",
  "id": "CVE-2026-82747",
  "modified": "2026-09-02T03:30:45.719760650Z",
  "published": "2026-09-01T04:14:57.840Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-82747.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82747"
    },
    {
      "type": "WEB",
      "url": "https://repo.hex.pm"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82747.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ash-project/ash/security/advisories/GHSA-4259-gvr2-4xhq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82747"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ash-project/ash/commit/6eddb8ab26e45023faf0c79ebd152bb40aefda02"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ash-project/ash"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Ash.Policy.Authorizer returns records denied by a runtime read policy to any actor"
}