ProxySQL pre-auth heap overflow in MySQL and PostgreSQL first-packet handling_CVE-2026-48773

{
    "lastseen": "",
    "description": "ProxySQL is a proxy for MySQL and its forks, as well as PostgreSQL. Versions 2.0.18 through 3.0.8 have a pre-authentication heap memory corruption vulnerability in the MySQL and PostgreSQL protocol first-read paths. A remote unauthenticated client can declare an oversized first packet length, and ProxySQL passes that attacker-controlled length directly to `recv()` while writing into a fixed 32 KB input queue. Version 3.0.9 patches the issue.",
    "published": "2026-06-19T19:27:12.183Z",
    "modified": "2026-06-19T19:27:12.183Z",
    "type": "cve",
    "title": "ProxySQL pre-auth heap overflow in MySQL and PostgreSQL first-packet handling",
    "source": "GitHub_M",
    "references": "https://github.com/sysown/proxysql/security/advisories/GHSA-58ww-865x-grpr\nhttps://github.com/sysown/proxysql/releases/tag/v3.0.9",
    "id": "CVE-2026-48773",
    "bulletinFamily": "",
    "cwe": [
        "CWE-787"
    ],
    "cvelist": null,
    "sourceData": "sysown proxysql >= 2.0.18, < 3.0.9",
    "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": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "proxysql",
    "version": ">= 2.0.18, < 3.0.9",
    "vendor": "sysown",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}