{"id":"CVE-2026-48773","aliases":["BIT-proxysql-2026-48773","EUVD-2026-38073","GHSA-58ww-865x-grpr"],"status":"published","title":"ProxySQL pre-auth heap overflow in MySQL and PostgreSQL first-packet handling","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":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00689,"percentile":0.53068,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-787"],"published":"2026-06-19T19:27:12Z","modified":"2026-10-28T02:30:23Z","fixes":[{"ecosystem":"Bitnami","package":"proxysql","fixed_in":["3.0.9"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"proxysql","ranges":[{"type":"SEMVER","events":[{"introduced":"2.0.18"},{"fixed":"3.0.9"}]}]}],"products":[{"vendor":"proxysql","product":"proxysql"},{"vendor":"sysown","product":"proxysql"}],"references":[{"url":"https://github.com/sysown/proxysql/security/advisories/GHSA-58ww-865x-grpr","tags":["x_refsource_CONFIRM","exploit","Exploit","Mitigation","Vendor Advisory","advisory"]},{"url":"https://github.com/sysown/proxysql/releases/tag/v3.0.9","tags":["x_refsource_MISC","Release Notes","article","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48773","tags":["web","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48773.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-48773","title":"ProxySQL pre-auth heap overflow in MySQL and PostgreSQL first-packet handling","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.","status":"published","published":"2026-06-19T19:27:12.183Z","modified":"2026-06-22T17:13:06.227Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T13:50:49.872037Z"}],"euvd":[{"id":"EUVD-2026-38073","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.","status":"published","published":"2026-06-19T19:27:12Z","modified":"2026-06-22T17:13:06Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T18:20:34.238696Z"}],"nvd":[{"id":"CVE-2026-48773","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.","status":"published","published":"2026-06-19T20:16:17.947Z","modified":"2026-10-25T23:10:00.167Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:12:24.912854Z"}],"osv":[{"id":"CVE-2026-48773","title":"ProxySQL pre-auth heap overflow in MySQL and PostgreSQL first-packet handling","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.","status":"published","published":"2026-06-19T19:27:12.183Z","modified":"2026-10-28T02:30:23.030981454Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:45:06.701612Z"},{"id":"BIT-proxysql-2026-48773","title":"ProxySQL pre-auth heap overflow in MySQL and PostgreSQL first-packet handling","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.","status":"published","published":"2026-08-17T05:52:41.749Z","modified":"2026-09-08T08:48:18.631428242Z","updated_at":"2026-11-02T15:28:34.724063Z"}]}}