{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "1.29.0-rc0"
              },
              {
                "fixed": "3.32.2"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "ca176f6e1aa5b5910a7be8876ba35b3745163adc"
            },
            {
              "fixed": "c4505a40d1f28ddb6a82fa7c12955d511f01d479"
            },
            {
              "fixed": "da07f009e889819ec410fa1f0f12534bfb9e21dd"
            }
          ],
          "repo": "https://github.com/ash-project/ash",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-mgwj-c69v-6f83"
  ],
  "database_specific": {
    "cna_assigner": "EEF",
    "cwe_ids": [
      "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82742.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "f6f5d194bfc7802bd32e48bf2eabd2d97a0109a4"
          },
          {
            "fixed": "da07f009e889819ec410fa1f0f12534bfb9e21dd"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Uncontrolled Resource Consumption vulnerability in ash-project ash lets an attacker exhaust node memory by matching a filter that spans multiple to-many relationships in memory.\n\nAsh.Filter.Runtime matches a filter against an in-memory record by first expanding the record into combinations of its related rows. flatten_relationships/2 (lib/ash/filter/runtime.ex) eagerly built the full Cartesian product across the filter's to-many relationship paths, so a record with K to-many relationships of M rows each materialized on the order of M^K scenarios before any predicate was checked. A filter or dataset that reaches several sizeable to-many relationships therefore allocates memory combinatorially and can exhaust the node. The fix streams the expansion lazily and short-circuits on the first matching scenario, bounding the work.\n\nThis issue affects ash: from 1.29.0-rc0 before 3.32.2.",
  "id": "CVE-2026-82742",
  "modified": "2026-09-04T11:30:25.092735540Z",
  "published": "2026-09-01T03:35:18.551Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-82742.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82742"
    },
    {
      "type": "WEB",
      "url": "https://repo.hex.pm"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82742.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ash-project/ash/security/advisories/GHSA-mgwj-c69v-6f83"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82742"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ash-project/ash/commit/da07f009e889819ec410fa1f0f12534bfb9e21dd"
    },
    {
      "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.Filter.Runtime materializes a combinatorial cross-product over to-many relationships, exhausting memory"
}