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 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-25)

CWE

CWE-787

Published

2026-06-19

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

Affected

• proxysql:proxysql

References

• https://github.com/sysown/proxysql/releases/tag/v3.0.9
• https://github.com/sysown/proxysql/security/advisories/GHSA-58ww-865x-grpr
• https://github.com/sysown/proxysql/security/advisories/GHSA-58ww-865x-grpr

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