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
2026-08-05T08:17:16.891075Z
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 
{
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "fixed": "0.24.8"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ],
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25627.json"
}
References

Affected packages

Git / github.com/nanomq/nanomq

Affected ranges

Type
GIT
Repo
https://github.com/nanomq/nanomq
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
6d061f2ead072a072f65ad2ae098155dabd3fd5a
Database specific 
{
    "cpe": "cpe:2.3:a:emqx:nanomq:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.24.8"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

0.*
0.0.1
0.0.2
0.0.3
0.1.0
0.10.1
0.10.5
0.10.8
0.11.0
0.11.2
0.11.3
0.11.5
0.11.8
0.11.82
0.12.0
0.12.1
0.12.2
0.12.5
0.13.0
0.13.6
0.13.8
0.14.0
0.14.1
0.14.5
0.14.8
0.15.0
0.15.1
0.15.2
0.15.3
0.15.5
0.16.0
0.16.2
0.16.3
0.16.5
0.17.2
0.17.5
0.17.8
0.18.1
0.18.2
0.19.0
0.19.1
0.19.5
0.2.0
0.2.1
0.2.2
0.2.5
0.20.0
0.20.5
0.20.6
0.20.8
0.21
0.21.1
0.21.10
0.21.2
0.21.5
0.21.6
0.21.7
0.21.8
0.21.9
0.22.0
0.22.1
0.22.10
0.22.2
0.22.3
0.22.6
0.22.7
0.22.8
0.23.0
0.23.1
0.23.10
0.23.2
0.23.3
0.23.4
0.23.5
0.23.6
0.23.7
0.23.7-11
0.23.8
0.23.9
0.24.0
0.24.1
0.24.2
0.24.3
0.24.3-5
0.24.4
0.24.5
0.24.6
0.24.7
0.3.0
0.3.2
0.3.3
0.3.4
0.3.5
0.3.8
0.4.0
0.4.1
0.4.2
0.4.3
0.4.5
0.4.8
0.5.0
0.5.2
0.5.5
0.5.8
0.5.9
0.6.0
0.6.2
0.6.3
0.6.4
0.6.7rc
0.6.8
0.7.0
0.7.2
0.7.3
0.7.4
0.7.4rc
0.7.5
0.7.5rc
0.7.8
0.7.9
0.8.0
0.8.3
0.8.5
0.8.6log
0.9.0
0.9.2
0.9.5
0.9.7

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25627.json"

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
e80b30bad6d855593a68d18f2785bfaca6faf09e
Database specific 
{
    "source": "REFERENCES"
}

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

vanir_signatures 
[
    {
        "source": "https://github.com/nanomq/nanonng/commit/e80b30bad6d855593a68d18f2785bfaca6faf09e",
        "digest": {
            "function_hash": "76086610257280749041254535834538149165",
            "length": 949.0
        },
        "deprecated": false,
        "target": {
            "file": "src/sp/transport/mqtts/broker_tls.c",
            "function": "tlstran_pipe_fini"
        },
        "signature_type": "Function",
        "id": "CVE-2026-25627-54699ee6",
        "signature_version": "v1"
    },
    {
        "source": "https://github.com/nanomq/nanonng/commit/e80b30bad6d855593a68d18f2785bfaca6faf09e",
        "digest": {
            "line_hashes": [
                "252891637145667191655716651488209674196",
                "195253836144219701941666044880114859428",
                "90995169562370650442716768841977459928",
                "94054021479005889112890875407949102520",
                "175644409234188798702707002696594201767",
                "331047984372360462194302748920600798419",
                "288504266138663707779094880013242394423",
                "181576409146658281898923496181737132039"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "target": {
            "file": "src/sp/transport/mqtts/broker_tls.c"
        },
        "signature_type": "Line",
        "id": "CVE-2026-25627-5f29d0ba",
        "signature_version": "v1"
    }
]
vanir_signatures_modified 
"2026-08-05T08:17:16Z"
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25627.json"