CVE
CVE-2026-48773
ProxySQL pre-auth heap overflow in MySQL and PostgreSQL first-packet handling
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.
Package Versions Affected
Package Version
patch Availability
No items found.
Automatically patch vulnerabilities without upgrading
Fix Without Upgrading
Detect compatible fix
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CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-
Related Resources
No items found.
References
https://github.com/sysown/proxysql/releases/tag/v3.0.9, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48773.json, https://github.com/sysown/proxysql/security/advisories/GHSA-58ww-865x-grpr, https://nvd.nist.gov/vuln/detail/CVE-2026-48773