CVE-2026-32696

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Source

https://cve.org/CVERecord?id=CVE-2026-32696

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-32696.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-32696

Aliases

GHSA-77f4-wvq8-mp3p

Published

2026-03-30T20:11:30.580Z

Modified

2026-04-12T20:14:04.642344Z

Severity

3.1 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L CVSS Calculator

Summary

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

Details

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In NanoMQ version 0.24.6, after enabling auth.httpauth (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 authhttp.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.

Database specific

{
    "cwe_ids": [
        "CWE-476"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32696.json",
    "cna_assigner": "GitHub_M"
}

References

Affected packages

Git / github.com/nanomq/nanonng

Affected ranges

Type

GIT

Repo

https://github.com/nanomq/nanonng

Events

Introduced

ed3ca6fe91f341e72cbee0b13321dc9502c7c09c

Fixed

89ac265ec2be8397aec05b383f03aad67189060e

Database specific

{
    "versions": [
        {
            "introduced": "0.24.6"
        },
        {
            "fixed": "0.24.7"
        }
    ]
}

Affected versions

0.*

0.24.6

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-32696.json"

vanir_signatures_modified

"2026-04-12T20:14:04Z"

vanir_signatures

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        "deprecated": false,
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            ]
        },
        "source": "https://github.com/nanomq/nanonng/commit/89ac265ec2be8397aec05b383f03aad67189060e",
        "id": "CVE-2026-32696-d5c74dd9",
        "signature_type": "Line",
        "target": {
            "file": "src/sp/transport/mqttws/nmq_websocket.c"
        }
    },
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        "signature_version": "v1",
        "deprecated": false,
        "digest": {
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        "source": "https://github.com/nanomq/nanonng/commit/89ac265ec2be8397aec05b383f03aad67189060e",
        "id": "CVE-2026-32696-de2051b1",
        "signature_type": "Function",
        "target": {
            "function": "wstran_pipe_send_cb",
            "file": "src/sp/transport/mqttws/nmq_websocket.c"
        }
    }
]