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
2026-03-30T20:11:08Z
Modified
2026-10-24T15:10:39Z
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 
{
    "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
Show details 
{
    "extracted_events":  [
        {
            "cpe":  "cpe:2.3:a:emqx:nanomq:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "0.24.8"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "original_tag":  "0.24.8",
            "range":  [
                {
                    "fixed":  "6d061f2ead072a072f65ad2ae098155dabd3fd5a"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}
Type
GIT
Repo
https://github.com/nanomq/nanonng
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b9d7c50427cf08f7d2bfc3a14fc6491240c22f06
Fixed
e80b30bad6d855593a68d18f2785bfaca6faf09e
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "0.24.8"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "e80b30bad6d855593a68d18f2785bfaca6faf09e"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

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
0.13.0
0.13.5
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
0.17.0
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
0.22.4
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"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "309800913491873718124619074714334176675",
            "length":  3078
        },
        "id":  "CVE-2026-25627-01d9a249",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/nanomq/nanonng/commit/b9d7c50427cf08f7d2bfc3a14fc6491240c22f06",
        "target":  {
            "file":  "src/sp/protocol/mqtt/nmq_mqtt.c",
            "function":  "nano_pipe_timer_cb"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "76086610257280749041254535834538149165",
            "length":  949
        },
        "id":  "CVE-2026-25627-54699ee6",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/nanomq/nanonng/commit/e80b30bad6d855593a68d18f2785bfaca6faf09e",
        "target":  {
            "file":  "src/sp/transport/mqtts/broker_tls.c",
            "function":  "tlstran_pipe_fini"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "252891637145667191655716651488209674196",
                "195253836144219701941666044880114859428",
                "90995169562370650442716768841977459928",
                "94054021479005889112890875407949102520",
                "175644409234188798702707002696594201767",
                "331047984372360462194302748920600798419",
                "288504266138663707779094880013242394423",
                "181576409146658281898923496181737132039"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-25627-5f29d0ba",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/nanomq/nanonng/commit/e80b30bad6d855593a68d18f2785bfaca6faf09e",
        "target":  {
            "file":  "src/sp/transport/mqtts/broker_tls.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "52562837256524356327979993874596151648",
                "192511616185809487929499117343456329477",
                "1125814297372660828841871265074305995",
                "322686954350396477348038069631681542925",
                "117308866211255878266283609353135917503",
                "174595936490344061058538576242768505128",
                "96173850441383276239143372226062820140",
                "59098854081215189807874004779527460270",
                "125543837073636808857060092663348847360",
                "131610742232146028047136284818114405067",
                "194675470649278745767877745860319467323",
                "335306372526313889534346190873415443118",
                "139085051258049829016987244527376804431",
                "198744605669538066734640835335895752507",
                "239192328744363590105831171240361118438",
                "128466653431523298641189769365754001632",
                "129993062006050832439492113501032675515",
                "305196029766787679083459384973036067915",
                "53247758151439035977572146045762749174",
                "44001474533754174300665999998854744659",
                "23492775416397180696561318164231258214"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-25627-f1faa686",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/nanomq/nanonng/commit/b9d7c50427cf08f7d2bfc3a14fc6491240c22f06",
        "target":  {
            "file":  "src/sp/protocol/mqtt/nmq_mqtt.c"
        }
    }
]
vanir_signatures_modified 
"2026-10-24T15:10:39Z"