{"id":"CVE-2026-48773","summary":"ProxySQL pre-auth heap overflow in MySQL and PostgreSQL first-packet handling","details":"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.","aliases":["GHSA-58ww-865x-grpr"],"modified":"2026-07-08T08:07:13.940561370Z","published":"2026-06-19T19:27:12.183Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48773.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-787"]},"references":[{"type":"WEB","url":"https://github.com/sysown/proxysql/releases/tag/v3.0.9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48773.json"},{"type":"ADVISORY","url":"https://github.com/sysown/proxysql/security/advisories/GHSA-58ww-865x-grpr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48773"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/sysown/proxysql","events":[{"introduced":"1c2b7e410551affac4e26d1b67646a2e51bd43da"},{"fixed":"7ddb3dc015d1440e8a0fb0bbafa2df9aaaa2669d"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"2.0.18"},{"fixed":"3.0.9"}]}}],"versions":["v4.0.8","v3.1.8","v3.0.8","3.0.9","3.0.8","v4.0.7","v3.1.7","v3.0.7","v4.0.6","v3.1.6","v3.0.6","3.0.6","v3.0.5","3.0.5","v3.0.4","3.0.4","v3.0.3","v3.0.2","3.0.3","3.0.2","v3.0.1","v3.0.0-alpha","v2.5.5","v2.5.4","2.6.0","2.5.4","v2.5.3","2.5.3","v2.5.2","2.5.2","v2.5.1","v2.5.0","2.5.1","v2.4.7","2.5.0","2.4.7","v2.4.6","2.4.6","v2.4.5","2.4.5","v2.4.4","2.4.4","v2.4.3","2.4.3","v2.4.2","2.4.2","v2.4.1","2.4.1","v2.4.0","2.4.0","v2.2.0","2.2.0","v2.1.1","v2.0.18"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48773.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}