DoS from MQTT v5.0 Deserialization Fault in core MQTT_CVE-2026-8686

{
    "lastseen": "",
    "description": "Missing bounds validation in the MQTT v5.0 property parser in coreMQTT before 5.0.1 allows an MQTT broker to cause a denial of service by sending a crafted packet.\n\n\n\nTo remediate this issue, users should upgrade to v5.0.1.",
    "published": "2026-05-15T18:38:10.651Z",
    "modified": "2026-05-15T18:38:10.651Z",
    "type": "cve",
    "title": "DoS from MQTT v5.0 Deserialization Fault in core MQTT",
    "source": "AMZN",
    "references": "https://github.com/FreeRTOS/coreMQTT/releases/tag/v5.0.1\nhttps://aws.amazon.com/security/security-bulletins/2026-032-aws/\nhttps://github.com/FreeRTOS/coreMQTT/security/advisories/GHSA-6qh9-r6jp-2wxc",
    "id": "CVE-2026-8686",
    "bulletinFamily": "",
    "cwe": [
        "CWE-125"
    ],
    "cvelist": null,
    "sourceData": "FreeRTOS coreMQTT 5.0.0",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "coreMQTT",
    "version": "5.0.0",
    "vendor": "FreeRTOS",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}