{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "1.9.0"
              },
              {
                "fixed": "1.12.0"
              },
              {
                "introduced": "0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "2d1eddc969fb38348e57a9262729a68964830cdb"
            },
            {
              "fixed": "fb918688bff7dfcfb377d8dbdea65fc785d5ae99"
            }
          ],
          "repo": "https://github.com/amazon-ion/ion-java",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-822f-6gg9-whr5"
  ],
  "database_specific": {
    "cna_assigner": "AMZN",
    "cwe_ids": [
      "CWE-789"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75935.json"
  },
  "details": "Uncontrolled memory allocation in the binary Ion stream cursor in Amazon ion-java before 1.12.0 might allow remote actors to cause a denial of service via a crafted Ion binary document containing a declared-length field that causes excessive heap preallocation.\n\n\n\nTo remediate this issue, users should upgrade to version 1.12.0.",
  "id": "CVE-2026-75935",
  "modified": "2026-08-22T03:30:58.815208971Z",
  "published": "2026-08-18T19:33:46.609Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://aws.amazon.com/security/security-bulletins/2026-083-aws/"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75935.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/amazon-ion/ion-java/security/advisories/GHSA-822f-6gg9-whr5"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75935"
    },
    {
      "type": "FIX",
      "url": "https://github.com/amazon-ion/ion-java/releases/tag/v1.12.0"
    }
  ],
  "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": "Memory-amplification denial of service via declared-length preallocation in Amazon ion-java"
}