CVE-2026-48773

{
  "id": "CVE-2026-48773",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-19T20:16:17.947",
  "lastModified": "2026-10-25T23:10:00.167",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "ProxySQL es un proxy para MySQL y sus bifurcaciones, así como para PostgreSQL. Las versiones 2.0.18 a la 3.0.8 tienen una vulnerabilidad de corrupción de memoria de pila pre-autenticación en las rutas de primera lectura del protocolo MySQL y PostgreSQL. Un cliente remoto no autenticado puede declarar una longitud de primer paquete excesiva, y ProxySQL pasa esa longitud controlada por el atacante directamente a ’recv()’ mientras escribe en una cola de entrada fija de 32 KB. La versión 3.0.9 corrige el problema."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "sysown",
          "product": "proxysql",
          "versions": [
            {
              "version": ">= 2.0.18, < 3.0.9",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-22T17:09:26.043878Z",
          "id": "CVE-2026-48773",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:proxysql:proxysql:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "2.0.18",
              "versionEndExcluding": "3.0.9",
              "matchCriteriaId": "2CAE8420-E970-4E9D-8781-F5F23004878A"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/sysown/proxysql/releases/tag/v3.0.9",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/sysown/proxysql/security/advisories/GHSA-58ww-865x-grpr",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://github.com/sysown/proxysql/security/advisories/GHSA-58ww-865x-grpr",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ]
    }
  ]
}