{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "proxysql",
          "vendor": "sysown",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.0.6, \u003c 3.0.9"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "ProxySQL is a proxy for MySQL and its forks, as well as PostgreSQL. In versions 3.0.0 through 3.0.8, ProxySQL\u0027s GenAI/MCP `run_sql_readonly` tool violates its documented read-only contract for MySQL targets. The tool validates only the full input string with a substring blacklist and first-keyword allowlist, but then executes the entire SQL string on a backend connection created with `CLIENT_MULTI_STATEMENTS`. As a result, a caller can submit a read-only first statement followed by a side-effecting second statement, such as `SELECT 1; RENAME TABLE ...`. The validator accepts the payload because it starts with `SELECT` and because side-effecting MySQL statements such as `RENAME TABLE`, `SET`, `RESET`, `LOCK TABLES`, and `KILL` are not rejected by the blacklist. In a live MCP runtime test, the `/mcp/query` endpoint accepted a `run_sql_readonly` request. The MCP response reported success for the first `SELECT`, and direct backend verification showed that the table had actually been renamed. This violates the endpoint\u0027s read-only security contract and lets an MCP caller perform backend writes or administrative SQL, limited by the configured MCP target account\u0027s database privileges. Version 3.0.9 contains a fix. Other operator mitigations include: keeping MCP disabled unless required; setting a non-empty `mcp-query_endpoint_auth` token before exposing `/mcp/query`; restricting MCP listener network exposure; configuring MCP backend target credentials as database-level read-only users; and adding temporary MCP query rules to block obvious multi-statement patterns."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20: Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-19T19:34:39.971Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/sysown/proxysql/security/advisories/GHSA-7wh6-2vcc-gcm4",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/sysown/proxysql/security/advisories/GHSA-7wh6-2vcc-gcm4"
        },
        {
          "name": "https://github.com/sysown/proxysql/commit/e32b7fd50c7c234ea628e392e621e09a2a919e08",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sysown/proxysql/commit/e32b7fd50c7c234ea628e392e621e09a2a919e08"
        }
      ],
      "source": {
        "advisory": "GHSA-7wh6-2vcc-gcm4",
        "discovery": "UNKNOWN"
      },
      "title": "ProxySQL MCP run_sql_readonly executes side-effecting MySQL multi-statements despite read-only contract"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-48774",
    "datePublished": "2026-06-19T19:34:39.971Z",
    "dateReserved": "2026-05-22T19:39:05.357Z",
    "dateUpdated": "2026-06-19T19:34:39.971Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}