PT-2026-51016 · Sysown · Proxysql

Kamil-Sawicki · Published 2026-06-19 · Updated 2026-06-19 · CVE-2026-48773

NVD

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-48773

Affected Products

Proxysql

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-48773 · Security Note
• https://github.com/sysown/proxysql/security/advisories/GHSA-58ww-865x-grpr · Note
• https://github.com/sysown/proxysql/releases/tag/v3.0.9 · Note