{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "5.16.6"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "a68b972a84ed6e52df9f30237cf47493b9231b53"
            }
          ],
          "repo": "https://github.com/xx-net/xx-net",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-1286"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10099.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "last_affected": "43aec6f"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "XX-Net V5.16.6 contains a WebSocket frame parsing vulnerability in the WebSocket_receive_worker routine of simple_http_server.py that allows attackers to cause corrupted application data by sending unmasked WebSocket frames. The server unconditionally reads 4 bytes as a masking key regardless of whether the MASK bit is set in the frame header, causing the first 4 bytes of payload to be consumed as a mask key and the remaining payload to be incorrectly XOR-decoded, resulting in data corruption alongside missing RSV bit, opcode, and FIN fragmentation validations.",
  "id": "CVE-2026-10099",
  "modified": "2026-08-12T03:51:22.729034284Z",
  "published": "2026-05-29T15:58:24.062Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10099.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-10099"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/xx-net-websocket-frame-parsing-data-corruption-via-simple-http-server-py"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/XX-net/XX-Net/issues/14169"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/XX-net/XX-Net/pull/14170"
    },
    {
      "type": "FIX",
      "url": "https://github.com/XX-net/XX-Net/commit/a68b972a84ed6e52df9f30237cf47493b9231b53"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "XX-Net V5.16.6 WebSocket Frame Parsing Data Corruption via simple_http_server.py"
}