phpMyFAQ – SQL Injection via User-Agent Header in BuiltinCaptcha_CVE-2026-46364

{
    "lastseen": "",
    "description": "phpMyFAQ before 4.1.2 contains an unauthenticated SQL injection vulnerability in BuiltinCaptcha::garbageCollector() and BuiltinCaptcha::saveCaptcha() methods that interpolate unsanitized User-Agent headers into DELETE and INSERT queries. Unauthenticated attackers can exploit the public GET /api/captcha endpoint by crafting malicious User-Agent headers to perform time-based blind SQL injection, extracting sensitive data including user credentials, admin tokens, and SMTP credentials from the database.",
    "published": "2026-05-15T18:36:42.869Z",
    "modified": "2026-05-15T18:36:42.869Z",
    "type": "cve",
    "title": "phpMyFAQ - SQL Injection via User-Agent Header in BuiltinCaptcha",
    "source": "VulnCheck",
    "references": "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-289f-fq7w-6q2w\nhttps://github.com/thorsten/phpMyFAQ/commit/b9f25109fddb38eee19987183798638d07943f92\nhttps://www.vulncheck.com/advisories/phpmyfaq-sql-injection-via-user-agent-header-in-builtincaptcha",
    "id": "CVE-2026-46364",
    "bulletinFamily": "",
    "cwe": [
        "CWE-89"
    ],
    "cvelist": null,
    "sourceData": "thorsten phpmyfaq 0",
    "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": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "phpmyfaq",
    "version": "0",
    "vendor": "thorsten",
    "ai_description": "Unauthenticated SQL injection vulnerability via User-Agent headers in BuiltinCaptcha methods",
    "ai_severity": "Critical",
    "ai_vendor": "Thorsten",
    "ai_product": "phpMyFAQ",
    "ai_version": "before 4.1.2",
    "ai_score": 9.8
}