{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "12.1.0"
              },
              {
                "last_affected": "12.1.11"
              },
              {
                "introduced": "12.0.0"
              },
              {
                "last_affected": "12.0.37"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "c8372b65bd15404de1444d68902c0455a3a69b64"
            },
            {
              "last_affected": "6c1ced3f077bc633716c54758a743b09b21328e8"
            },
            {
              "introduced": "28100e8da711e44c0722ed10bd413ae862497539"
            },
            {
              "last_affected": "ceb2461aabfc7e4f362f2602ea2eeb5bd67599db"
            }
          ],
          "repo": "https://github.com/jetty/jetty.project",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-85fq-fc5f-7j7g"
  ],
  "database_specific": {
    "cna_assigner": "eclipse",
    "cwe_ids": [
      "CWE-770",
      "CWE-789"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/19xxx/CVE-2026-19204.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "11.0.0"
          },
          {
            "last_affected": "11.0.31"
          },
          {
            "introduced": "10.0.0"
          },
          {
            "last_affected": "10.0.31"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "A client may send a WebSocket frame with an unknown opcode and a very large declared payload length, causing Jetty to attempt a large memory allocation and potentially exhaust the JVM heap.\n\n\n\n\nThis occurs when auto-fragmentation is enabled, as unknown opcodes bypass the normal maximum frame size handling and payload allocation occurs before the opcode is validated.",
  "id": "CVE-2026-19204",
  "modified": "2026-09-10T03:31:01.849310273Z",
  "published": "2026-09-07T10:19:24.186Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/19xxx/CVE-2026-19204.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/jetty/jetty.project/security/advisories/GHSA-85fq-fc5f-7j7g"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19204"
    }
  ],
  "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"
    }
  ]
}