Vulnerability from bitnami_vulndb
Published
2026-08-17 05:52
Modified
2026-08-17 06:10
Summary
ProxySQL pre-auth heap overflow in MySQL and PostgreSQL first-packet handling
Details

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.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "proxysql",
        "purl": "pkg:bitnami/proxysql"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.18"
            },
            {
              "fixed": "3.0.9"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-48773"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:proxysql:proxysql:*:*:*:*:*:*:*:*"
    ],
    "severity": "Critical"
  },
  "details": "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.",
  "id": "BIT-proxysql-2026-48773",
  "modified": "2026-08-17T06:10:32.268Z",
  "published": "2026-08-17T05:52:41.749Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/sysown/proxysql/releases/tag/v3.0.9"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sysown/proxysql/security/advisories/GHSA-58ww-865x-grpr"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48773"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "ProxySQL pre-auth heap overflow in MySQL and PostgreSQL first-packet handling"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.