{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.16.23"
              },
              {
                "fixed": "1.11.0"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "9eda8c2cc146a33d94221b7a6ae1719f1625fe66"
            },
            {
              "fixed": "4e2c5476ecfd2c701488627ee46e6eefc58c982e"
            },
            {
              "fixed": "c3229f6a65cbabb32fd7ffcac881922d1b3b30ad"
            }
          ],
          "repo": "https://github.com/ash-project/ash_graphql",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-mwc4-r9fc-h6mg"
  ],
  "database_specific": {
    "cna_assigner": "EEF",
    "cwe_ids": [
      "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81636.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "d8a3e1b15587180ad9cb3ceeb398863d086c163b"
          },
          {
            "fixed": "c3229f6a65cbabb32fd7ffcac881922d1b3b30ad"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Allocation of Resources Without Limits or Throttling vulnerability in ash-project ash_graphql allows an unauthenticated client to bypass the configured GraphQL query-complexity limit and force an unbounded database read.\n\nAshGraphql.Graphql.Resolver.query_complexity/3 multiplies child complexity by the requested page size only when the argument map contains :limit (offset pagination). Relay connections and keyset pagination use first and last, which never match that clause and fall through to the catch-all that returns child_complexity + 1. A nested relay query such as posts(first: 500) { edges { node { comments(first: 500) { ... } } } } therefore scores as trivially cheap while materializing the full fan-out, passing an Absinthe max_complexity cap that rejects the equivalent limit-based query. The fix adds first and last clauses clamped to the action's page size.\n\nThis issue affects ash_graphql: from 0.16.23 before 1.11.0.",
  "id": "CVE-2026-81636",
  "modified": "2026-09-01T03:30:19.613853584Z",
  "published": "2026-08-30T18:25:29.776Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-81636.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-81636"
    },
    {
      "type": "WEB",
      "url": "https://repo.hex.pm"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81636.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ash-project/ash_graphql/security/advisories/GHSA-mwc4-r9fc-h6mg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81636"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ash-project/ash_graphql/commit/c3229f6a65cbabb32fd7ffcac881922d1b3b30ad"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ash-project/ash_graphql"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Query-complexity limit bypass via first/last pagination arguments in AshGraphql enables denial of service"
}