Metadata name collision on $-prefixed fields causes post-auth server crash_CVE-2026-9750

{
    "lastseen": "",
    "description": "An authenticated user can cause a MongoDB server to crash or return incorrect results by creating documents that interfere with internal metadata processing during query execution. This stems from insufficient separation between user-controlled document fields and internal metadata in certain execution paths.",
    "published": "2026-06-09T22:17:08.144Z",
    "modified": "2026-06-09T22:17:08.144Z",
    "type": "cve",
    "title": "Metadata name collision on $-prefixed fields causes post-auth server crash",
    "source": "mongodb",
    "references": "https://jira.mongodb.org/browse/SERVER-123633",
    "id": "CVE-2026-9750",
    "bulletinFamily": "",
    "cwe": [
        "CWE-617"
    ],
    "cvelist": null,
    "sourceData": "MongoDB MongoDB Server 8.3.0\nMongoDB MongoDB Server 8.2.0\nMongoDB MongoDB Server 8.0.0\nMongoDB MongoDB Server 7.0.0",
    "sourceHref": "",
    "cvss": {
        "score": 7.1,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "MongoDB Server",
    "version": "8.3.0",
    "vendor": "MongoDB",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}