CVE-2026-25627

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Source
https://cve.org/CVERecord?id=CVE-2026-25627
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25627.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-25627
Aliases
  • GHSA-w4rh-v3h2-j29x
Published
2026-03-30T20:11:08.586Z
Modified
2026-04-12T20:23:13.010166Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
nanomq: OOB Read / Crash (DoS) via Malformed MQTT Remaining Length over WebSocket
Details

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to version 0.24.8, NanoMQ’s MQTT-over-WebSocket transport can be crashed by sending an MQTT packet with a deliberately large Remaining Length in the fixed header while providing a much shorter actual payload. The code path copies Remaining Length bytes without verifying that the current receive buffer contains that many bytes, resulting in an out-of-bounds read (ASAN reports OOB / crash). This is remotely triggerable over the WebSocket listener. This issue has been patched in version 0.24.8.

Database specific 
{
    "cwe_ids": [
        "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25627.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
0 Unknown introduced commit / All previous commits are affected
Fixed
b9d7c50427cf08f7d2bfc3a14fc6491240c22f06
Database specific 
{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.24.8"
        }
    ]
}

Affected versions

0.*
0.11.5
0.11.8
0.13
0.13.5
0.14.5
0.15.3
0.15.5
0.16.0
0.16.3
0.16.5
0.17.0
0.17.2
0.17.8
0.18.2
0.19.1
0.20.0
0.20.5
0.20.8
0.21
0.21.2
0.21.5
0.21.6
0.21.8
0.21.9
0.22.0
0.22.1
0.22.10
0.22.2
0.22.4
0.22.6
0.22.8
0.23.1
0.23.10
0.23.2
0.23.3
0.23.5
0.23.7
0.23.8
0.23.9
0.24.0
0.24.1
0.24.2
0.24.3
0.24.5
0.24.6
0.24.7
0.7.2
0.8.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25627.json"
vanir_signatures_modified 
"2026-04-12T20:23:13Z"
vanir_signatures 
[
    {
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "length": 3078.0,
            "function_hash": "309800913491873718124619074714334176675"
        },
        "source": "https://github.com/nanomq/nanonng/commit/b9d7c50427cf08f7d2bfc3a14fc6491240c22f06",
        "id": "CVE-2026-25627-01d9a249",
        "signature_type": "Function",
        "target": {
            "function": "nano_pipe_timer_cb",
            "file": "src/sp/protocol/mqtt/nmq_mqtt.c"
        }
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "52562837256524356327979993874596151648",
                "192511616185809487929499117343456329477",
                "1125814297372660828841871265074305995",
                "322686954350396477348038069631681542925",
                "117308866211255878266283609353135917503",
                "174595936490344061058538576242768505128",
                "96173850441383276239143372226062820140",
                "59098854081215189807874004779527460270",
                "125543837073636808857060092663348847360",
                "131610742232146028047136284818114405067",
                "194675470649278745767877745860319467323",
                "335306372526313889534346190873415443118",
                "139085051258049829016987244527376804431",
                "198744605669538066734640835335895752507",
                "239192328744363590105831171240361118438",
                "128466653431523298641189769365754001632",
                "129993062006050832439492113501032675515",
                "305196029766787679083459384973036067915",
                "53247758151439035977572146045762749174",
                "44001474533754174300665999998854744659",
                "23492775416397180696561318164231258214"
            ]
        },
        "source": "https://github.com/nanomq/nanonng/commit/b9d7c50427cf08f7d2bfc3a14fc6491240c22f06",
        "id": "CVE-2026-25627-f1faa686",
        "signature_type": "Line",
        "target": {
            "file": "src/sp/protocol/mqtt/nmq_mqtt.c"
        }
    }
]