CVE-2026-48773

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/sysown/proxysql/releases/tag/v3.0.9	Release Notes
https://github.com/sysown/proxysql/security/advisories/GHSA-58ww-865x-grpr	Exploit Mitigation Vendor Advisory
https://github.com/sysown/proxysql/security/advisories/GHSA-58ww-865x-grpr	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:proxysql:proxysql:*:*:*:*:*:*:*:*

History

25 Oct 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) 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.

Information

Published : 2026-06-19 20:16

Updated : 2026-10-25 23:10

NVD link : CVE-2026-48773

Mitre link : CVE-2026-48773

CVE.ORG link : CVE-2026-48773

JSON object : View

Products Affected

proxysql

proxysql

CWE

CWE-787

Out-of-bounds Write

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