FastGPT: NoSQL Injection in loginByPassword leads to Authentication Bypass_CVE-2026-40351

{
    "lastseen": "",
    "description": "FastGPT is an AI Agent building platform. In versions prior to 4.14.9.5, the password-based login endpoint uses TypeScript type assertion without runtime validation, allowing an unauthenticated attacker to pass a MongoDB query operator object (e.g., {\"$ne\": \"\"}) as the password field. This NoSQL injection bypasses the password check, enabling login as any user including the root administrator. This issue has been fixed in version 4.14.9.5.",
    "published": "2026-04-17T21:05:05.911Z",
    "modified": "2026-04-17T21:05:05.911Z",
    "type": "cve",
    "title": "FastGPT: NoSQL Injection in loginByPassword leads to Authentication Bypass",
    "source": "GitHub_M",
    "references": "https://github.com/labring/FastGPT/security/advisories/GHSA-x8mx-2mr7-h9xg\nhttps://github.com/labring/FastGPT/commit/bd966d479fbe414d02679cf79f9eaaab3d100a2d\nhttps://github.com/labring/FastGPT/releases/tag/v4.14.9.5",
    "id": "CVE-2026-40351",
    "bulletinFamily": "",
    "cwe": [
        "CWE-943"
    ],
    "cvelist": null,
    "sourceData": "labring FastGPT < 4.14.9.5",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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": "",
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            "privilegesRequired": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "FastGPT",
    "version": "< 4.14.9.5",
    "vendor": "labring",
    "ai_description": "NoSQL injection vulnerability in loginByPassword endpoint, allowing authentication bypass",
    "ai_severity": "Critical",
    "ai_vendor": "labring",
    "ai_product": "FastGPT",
    "ai_version": "< 4.14.9.5",
    "ai_score": 9.8
}