{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:emqx:nanomq:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.24.10"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "24e6327aa79d57c5d92e2119a94396a8fc213051"
            },
            {
              "fixed": "9499a4b2c47998a6aadb69238c18b9e6771b1691"
            }
          ],
          "repo": "https://github.com/nanomq/nanomq",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-8p57-jxj9-3qq3"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-125",
      "CWE-457"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34608.json"
  },
  "details": "NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to version 0.24.10, in NanoMQ's webhook_inproc.c, the hook_work_cb() function processes nng messages by parsing the message body with cJSON_Parse(body). The body is obtained from nng_msg_body(msg), which is a binary buffer without a guaranteed null terminator. This leads to an out-of-bounds read (OOB read) as cJSON_Parse reads until it finds a \\0, potentially accessing memory beyond the allocated buffer (e.g., nng_msg metadata or adjacent heap/stack). The issue is often masked by nng's allocation padding (extra 32 bytes of zeros for non-power-of-two sizes \u003c1024 or non-aligned). The overflow is reliably triggered when the JSON payload length is a power-of-two \u003e=1024 (no padding added). This issue has been patched in version 0.24.10.",
  "id": "CVE-2026-34608",
  "modified": "2026-07-15T01:49:18.679447897Z",
  "published": "2026-04-02T17:52:51.813Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nanomq/nanomq/releases/tag/0.24.10"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34608.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/nanomq/nanomq/security/advisories/GHSA-8p57-jxj9-3qq3"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34608"
    },
    {
      "type": "FIX",
      "url": "https://github.com/nanomq/nanomq/commit/9499a4b2c47998a6aadb69238c18b9e6771b1691"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "nanomq: Heap-Buffer-Overflow in webhook_inproc.c via cJSON_Parse OOB Read"
}