CVE-2026-48773
Critical · 9.8CVSS
9.8
EPSS
0.7%
Published
Jun 19, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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