Atom Exhaustion via _entities Representation Keys in DivvyPayHQ absinthe_federation

{
  "id": "b9aa91787d0c3852791592716d64ef2f51d4a8bd845a4e5508053a7d3b3a30aa",
  "url": "https://osv.dev/vulnerability/CVE-2026-67585",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Atom Exhaustion via _entities Representation Keys in DivvyPayHQ absinthe_federation",
    "summary": "Allocation of Resources Without Limits or Throttling vulnerability in DivvyPayHQ absinthe_federation allows an unauthenticated remote attacker to abort the Erlang VM via crafted _entities representation keys. Every key of every object in the representations argument of the federation-mandated _entities field is converted with String.to_atom/1 by convert_key/2 in lib/absinthe/federation/schema/entities_field.ex. representations is typed as the open-ended _Any scalar, so its keys bypass schema coercion and the attacker names them freely. Atoms are never garbage collected and the BEAM atom table is hard-capped (about 1,048,576 entries by default), so one request carrying tens of thousands of unique keys creates that many permanent atoms and a handful of such requests exhausts the table and aborts the node. The impact is confined to availability: no data is read or altered, and recovery requires restarting the application. This issue affects absinthe_federation: from 0.1.0 before 0.9.3.",
    "evidence": "osv:CVE-2026-67585",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-67585",
      "aliases": [
        "CVE-2026-67585",
        "EEF-CVE-2026-67585",
        "GHSA-55hv-mwvr-phf3"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/divvypayhq/absinthe_federation",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2587b230b91fb0e1e22d747014f9b44d0e3bef2d"
                },
                {
                  "fixed": "c3838cda2a7f65c4893291668c223b0d6acf4516"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.1.0"
                      },
                      {
                        "fixed": "0.9.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c3838cda2a7f65c4893291668c223b0d6acf4516"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0.1.0"
                      },
                      {
                        "fixed": "0.9.3"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.9.2",
            "v0.9.1",
            "v0.9.0",
            "v0.8.0",
            "v0.7.1",
            "v0.7.0",
            "v0.6.1",
            "v0.6.0",
            "v0.5.4",
            "v0.5.3",
            "v0.5.2",
            "v0.5.0",
            "v0.4.2",
            "v0.4.1",
            "v0.3.2",
            "v0.3.1",
            "v0.3.0",
            "v0.2.53",
            "v0.2.52",
            "v0.2.51",
            "v0.2.4",
            "v0.2.3",
            "v0.2.2",
            "v0.2.1",
            "v0.2.0",
            "v0.1.9",
            "v0.1.8",
            "v0.1.7",
            "v0.1.6",
            "v0.1.5",
            "v0.1.4",
            "v0.1.3",
            "v0.1.2",
            "v0.1.1",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67585.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:40.904306206Z",
      "provider": "osv",
      "references": [
        "https://cna.erlef.org/cves/CVE-2026-67585.html",
        "https://github.com",
        "https://osv.dev/vulnerability/EEF-CVE-2026-67585",
        "https://repo.hex.pm",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67585.json",
        "https://github.com/DivvyPayHQ/absinthe_federation/security/advisories/GHSA-55hv-mwvr-phf3",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-67585",
        "https://github.com/DivvyPayHQ/absinthe_federation/commit/c3838cda2a7f65c4893291668c223b0d6acf4516",
        "https://github.com/DivvyPayHQ/absinthe_federation"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-770"
        ],
        "cna_assigner": "EEF",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67585.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-67585",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 508698,
  "published_at": "2026-08-07T16:42:22.653+00:00"
}