Use-After-Free in MongoDB FLE Query Analysis When Processing Positional Projections on Encrypted Fields_CVE-2026-8201

{
    "lastseen": "",
    "description": "A use-after-free vulnerability exists in MongoDB's Field-Level Encryption (FLE) query analysis component, affecting client-side uses of mongocryptd and crypt_shared. Triggering this vulnerability requires control over the structure of a client's FLE-related query.\n\nThis issue impacts MongoDB Server\u2019s mongocryptd component v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.",
    "published": "2026-05-13T00:12:35.299Z",
    "modified": "2026-05-13T00:12:35.299Z",
    "type": "cve",
    "title": "Use-After-Free in MongoDB FLE Query Analysis When Processing Positional Projections on Encrypted Fields",
    "source": "mongodb",
    "references": "https://jira.mongodb.org/browse/SERVER-122032",
    "id": "CVE-2026-8201",
    "bulletinFamily": "",
    "cwe": [
        "CWE-416"
    ],
    "cvelist": null,
    "sourceData": "MongoDB, Inc. MongoDB Server 7.0\nMongoDB, Inc. MongoDB Server 8.0\nMongoDB, Inc. MongoDB Server 8.2\nMongoDB, Inc. MongoDB Server 8.3",
    "sourceHref": "",
    "cvss": {
        "score": 6.1,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:H/SC:L/SI:N/SA:N",
        "version": "4.0"
    },
    "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": "MongoDB Server",
    "version": "7.0",
    "vendor": "MongoDB, Inc.",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}