CVE-2026-47275

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Source
https://cve.org/CVERecord?id=CVE-2026-47275
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47275.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-47275
Aliases
  • GHSA-52qr-3v49-wmx6
Published
2026-07-20T16:43:03.704Z
Modified
2026-07-22T05:29:49.844543123Z
Severity
  • 2.6 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L CVSS Calculator
Summary
nanomq NULL Pointer Dereference in MQTTv5 Client CONNECT Decoder Leading to Remote DoS
Details

In nanomq versions 0.24.11 and earlier, a NULL pointer dereference in nni_mqttv5_msg_decode_connect() allows a malicious MQTT broker to crash any connecting NanoMQ MQTTv5 client (including bridge mode) with a single packet, causing remote denial of service via SIGSEGV. In nni_mqttv5_msg_decode_connect() (mqtt_codec.c:1863), the code iterates over CONNECT properties using variable prop when it should use will_prop. When a CONNECT packet has no connect-level properties (prop == NULL) but has will properties (will_prop != NULL), dereferencing prop->next causes SIGSEGV at address 0x38 (NULL + offsetof(property, next)).

This affects both nanomq_cli and NanoMQ bridge mode (Core component), as both use the same mqtt_client.c receive path. This can lead to remote DoS if a malicious MQTT broker can crash the client process with a single 35-byte packet and persistent DoS if auto-reconnect causes infinite crash loop.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47275.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-476"
    ]
}
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
Last affected
69a97b3b39cc218f044f1c8896f4d3d8757bb394
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "0.24.11"
        }
    ],
    "source": "AFFECTED_FIELD"
}

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
0.24.10
0.24.11
0.24.2
0.24.3
0.24.3-5
0.24.4
0.24.5
0.24.6
0.24.7
0.24.8
0.24.9
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-2026-47275.json"