NanoMQ HTTP Auth: Missing username/password can trigger a NULL-pointer strlen() in auth_http.c:set_data(), causing a process crash — SIGSEGV, remotely triggerable_CVE-2026-32696

{
    "lastseen": "",
    "description": "NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In NanoMQ version 0.24.6, after enabling auth.http_auth (HTTP authentication), when a client connects to the broker using MQTT CONNECT without providing username/password, and the configuration params uses the placeholders %u / %P (e.g., username=\"%u\", password=\"%P\"), the HTTP request construction phase enters auth_http.c:set_data(). This results in calling strlen() on a NULL pointer, causing a SIGSEGV crash. This crash can be triggered remotely, resulting in a denial of service. This issue has been patched in version 0.24.7.",
    "published": "2026-03-30T20:11:30.580Z",
    "modified": "2026-03-31T15:24:06.506Z",
    "type": "cve",
    "title": "NanoMQ HTTP Auth: Missing username/password can trigger a NULL-pointer strlen() in auth_http.c:set_data(), causing a process crash \u2014 SIGSEGV, remotely triggerable",
    "source": "GitHub_M",
    "references": "https://github.com/nanomq/nanomq/security/advisories/GHSA-77f4-wvq8-mp3p\nhttps://github.com/nanomq/NanoNNG/pull/1394\nhttps://github.com/nanomq/NanoNNG/commit/c20aa27e5290bb480a5315099952480d35f37a8b\nhttps://github.com/nanomq/nanomq/releases/tag/0.24.7",
    "id": "CVE-2026-32696",
    "bulletinFamily": "",
    "cwe": [
        "CWE-476"
    ],
    "cvelist": null,
    "sourceData": "nanomq nanomq >= 0.24.6, < 0.24.7",
    "sourceHref": "",
    "cvss": {
        "score": 3.1,
        "severity": "LOW",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
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        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "nanomq",
    "version": ">= 0.24.6, < 0.24.7",
    "vendor": "nanomq",
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}