{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "4.0.0"
              },
              {
                "last_affected": "4.5.34"
              },
              {
                "introduced": "5.0.0"
              },
              {
                "last_affected": "5.0.12"
              },
              {
                "introduced": "5.1.0"
              },
              {
                "last_affected": "5.1.9"
              },
              {
                "introduced": "5.2.0"
              },
              {
                "last_affected": "5.2.0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "fcf4f410042fef02c397f446c9c703a421cc21d9"
            },
            {
              "last_affected": "c37b914c9950d9d491475925579ca58d662ffee9"
            },
            {
              "introduced": "17a7c085ebd9f494c1a5d42b46b43676528d48ea"
            },
            {
              "last_affected": "c11fb6a120811b96348861b9397850b4ac4e1ca1"
            },
            {
              "introduced": "41fcf902bcc77021e0e9aeb3438cb3765c3c2ff2"
            },
            {
              "last_affected": "19c6f28903062f0b0b39d7b42438e3b629614195"
            },
            {
              "introduced": "51656be5a0d9b854b0baf7e9cef54a78711e16cf"
            },
            {
              "last_affected": "51656be5a0d9b854b0baf7e9cef54a78711e16cf"
            }
          ],
          "repo": "https://github.com/eclipse-vertx/vertx-json-schema",
          "type": "GIT"
        }
      ],
      "versions": [
        "5.2.0"
      ]
    }
  ],
  "aliases": [
    "GHSA-4m87-8qfr-8p8m"
  ],
  "database_specific": {
    "cna_assigner": "eclipse",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102461.json"
  },
  "details": "In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the uniqueItems keyword validation uses an O(n²) pairwise comparison loop with no short-circuit or size limit. A remote unauthenticated attacker can submit a moderately-sized JSON array that consumes disproportionate CPU time, leading to denial of service.\n\n\n\nThe impacted component is io.vertx:vertx-json-schema.\n\n\n\nThe following Vert.x modules depend on vertx-json-schema and are also affected:\n\n\n\nio.vertx:vertx-web-openapi-router io.vertx:vertx-web-validation io.vertx:vertx-openapi",
  "id": "CVE-2026-102461",
  "modified": "2026-10-17T10:30:33.025153821Z",
  "published": "2026-10-15T08:23:54.256Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://gitlab.eclipse.org/security/cve-assignment/-/work_items/340"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102461.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/eclipse-vertx/vertx-json-schema/security/advisories/GHSA-4m87-8qfr-8p8m"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-102461"
    }
  ],
  "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"
    }
  ]
}