{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "c453cdc0b8570e86ffef0d10e136247f52b3ea76"
            }
          ],
          "repo": "https://github.com/ash-project/ash",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-7xfw-9jwm-9c4c"
  ],
  "database_specific": {
    "cna_assigner": "EEF",
    "cwe_ids": [
      "CWE-20"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82738.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "3.6.3"
          },
          {
            "fixed": "3.32.2"
          },
          {
            "introduced": "751d8a4d11564efbe358c90c8347f3a00eb60782"
          },
          {
            "fixed": "c453cdc0b8570e86ffef0d10e136247f52b3ea76"
          }
        ],
        "source": "AFFECTED_FIELD"
      },
      {
        "extracted_events": [
          {
            "introduced": "3.6.3"
          },
          {
            "fixed": "3.32.2"
          }
        ],
        "source": "CPE_FIELD"
      },
      {
        "extracted_events": [
          {
            "introduced": "3.6.3"
          },
          {
            "fixed": "3.32.2"
          }
        ],
        "source": "DESCRIPTION"
      }
    ]
  },
  "details": "Improper Input Validation vulnerability in ash-project ash allows an attacker to persistently deny reads of a record by storing a non-version-7 UUID in an Ash.Type.UUIDv7 attribute.\n\nAsh.Type.UUIDv7.cast_input/2 accepts any well-formed UUID string, including non-version-7 UUIDs, and stores it as a 16-byte binary. On read, cast_stored/2 (lib/ash/type/uuid_v7.ex) routes the stored binary back through cast_input/2, which since an input-validation tightening in v3.6.3 matches only version-7 (and optionally version-4) 16-byte binaries and otherwise expects a 36-character string. A stored non-v7 16-byte binary matches neither clause and returns :error, so every later read of that record fails. An attacker able to set such an attribute poisons the row permanently. The fix decodes any 16-byte stored binary directly in cast_stored/2.\n\nThis issue affects ash: from 3.6.3 before 3.32.2.",
  "id": "CVE-2026-82738",
  "modified": "2026-09-02T03:30:32.983520592Z",
  "published": "2026-09-01T03:26:23.035Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-82738.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82738"
    },
    {
      "type": "WEB",
      "url": "https://repo.hex.pm"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82738.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ash-project/ash/security/advisories/GHSA-7xfw-9jwm-9c4c"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82738"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ash-project/ash/commit/c453cdc0b8570e86ffef0d10e136247f52b3ea76"
    },
    {
      "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:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Ash.Type.UUIDv7 accepts non-v7 UUIDs that then fail to load, causing persistent denial of service"
}