CVE-2026-48773 - ProxySQL pre-auth heap overflow in MySQL and PostgreSQL first-packet handling

CVE-2026-48773 - ProxySQL pre-auth heap overflow in MySQL and PostgreSQL first-packet handling

https://cvefeed.io/rssfeed/latest.atom / Sat, 06/20/2026 - 02:45
CVE ID :CVE-2026-48773
Published : June 19, 2026, 7:27 p.m. | 4 hours, 12 minutes ago
Description :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.
Severity: 9.8 | CRITICAL
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