{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.1.6"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "493c12251be6ad93b924abb5cf8621e69f1dd2d5"
            }
          ],
          "repo": "https://github.com/amazon-ion/ion-c",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9gfg-hgj4-gh44"
  ],
  "database_specific": {
    "cna_assigner": "AMZN",
    "cwe_ids": [
      "CWE-674"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84851.json"
  },
  "details": "An uncontrolled recursion issue exists in Amazon Ion-C versions before 1.1.6 that might allow a remote unauthenticated actor to craft Ion data that exhausts the native call stack and crashes the application using the library, resulting in a denial of service.",
  "id": "CVE-2026-84851",
  "modified": "2026-09-05T03:31:04.437183320Z",
  "published": "2026-09-02T20:19:55.616Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://aws.amazon.com/security/security-bulletins/2026-094-aws/"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84851.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/amazon-ion/ion-c/security/advisories/GHSA-9gfg-hgj4-gh44"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84851"
    },
    {
      "type": "FIX",
      "url": "https://github.com/amazon-ion/ion-c/releases/tag/v1.1.6"
    }
  ],
  "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": "Uncontrolled recursion in the Ion reader in Amazon Ion-C before 1.1.6"
}