CVE-2026-48773
Last modified
CVE-2026-48773 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 0.65% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Proxysql | Proxysql | >= 2.0.18, < 3.0.9 |
References
- https://github.com/sysown/proxysql/security/advisories/GHSA-58ww-865x-grprExploit, Mitigation, Vendor Advisory
- https://github.com/sysown/proxysql/security/advisories/GHSA-58ww-865x-grprExploit, Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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