CVE-2026-54412

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Source

https://cve.org/CVERecord?id=CVE-2026-54412

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54412.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-54412

Published

2026-06-14T17:26:36Z

Modified

2026-08-12T03:51:42Z

Severity

7.8 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/AU:Y/V:D CVSS Calculator

Summary

MQTT-C Heap Out-of-Bounds Read and Integer Underflow in mqtt_unpack_publish_response()

Details

LiamBindle MQTT-C through version 1.1.6 contains a heap-based out-of-bounds read and integer underflow in the mqtt_unpack_publish_response function in src/mqtt.c that allows a remote unauthenticated attacker controlling an MQTT broker - or able to inject MQTT traffic into an unencrypted session - to crash a subscribed MQTT-C client and potentially disclose adjacent heap memory by sending a single crafted PUBLISH packet.

Database specific

{
    "cna_assigner": "TuranSec",
    "cwe_ids": [
        "CWE-125",
        "CWE-191"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54412.json"
}

References

Affected packages

Git / github.com/liambindle/mqtt-c

Affected ranges

Type

GIT

Repo

https://github.com/liambindle/mqtt-c

Events

Introduced

Fixed

f69ce1e7fd54f3b1834c9c9137ce0ec5d703cb4d

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.1.6"
        },
        {
            "fixed": "1.1.6"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

1.*

1.0.0

1.0.1

1.0.2

1.0.3

1.1.0

1.1.1

1.1.2

1.1.3

1.1.4

1.1.5

v1.*

v1.0.0

v1.0.1

v1.0.2

v1.0.3

v1.1.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54412.json"