NATS has MQTT plaintext password disclosure_CVE-2026-33216

{
    "lastseen": "",
    "description": "NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, for MQTT deployments using usercodes/passwords: MQTT passwords are incorrectly classified as a non-authenticating identity statement (JWT) and exposed via monitoring endpoints. Versions 2.11.14 and 2.12.6 contain a fix. As a workaround, ensure monitoring end-points are adequately secured. Best practice remains to not expose the monitoring endpoint to the Internet or other untrusted network users.",
    "published": "2026-03-25T19:41:55.670Z",
    "modified": "2026-03-28T01:37:49.970Z",
    "type": "cve",
    "title": "NATS has MQTT plaintext password disclosure",
    "source": "GitHub_M",
    "references": "https://github.com/nats-io/nats-server/security/advisories/GHSA-v722-jcv5-w7mc\nhttps://github.com/nats-io/nats-server/commit/b5b63cfc35a57075e09c1f57503d31721bed8099\nhttps://advisories.nats.io/CVE/secnote-2026-05.txt",
    "id": "CVE-2026-33216",
    "bulletinFamily": "",
    "cwe": [
        "CWE-256"
    ],
    "cvelist": null,
    "sourceData": "nats-io nats-server < 2.11.15\nnats-io nats-server >= 2.12.0-RC.1, < 2.12.6",
    "sourceHref": "",
    "cvss": {
        "score": 8.6,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
        "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": "nats-server",
    "version": "< 2.11.15",
    "vendor": "nats-io",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}