SQL Data Source Plugin: OOM DoS via $__timeGroup macro
Medium
| Advisory ID: | CVE-2026-19475 |
| Published: | 2026-09-02 |
| Product: | PostgreSQL Datasource |
| CVSS Score: | 6.5 |
| CVSS Vector: | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| Fixed Versions: | <11.6.0 >=12.4.10 <13.0.0 >=13.0.8 <13.1.0 >=13.1.5 |
Summary
An authenticated user with permission to query a SQL data source can bypass the fix for CVE-2026-33375 by injecting the timeGroup macro through a WHERE clause, which Grafana’s regex-based macro parsing does not reject. Evaluating the injected macro causes uncontrolled memory consumption that can terminate the Grafana server process, resulting in a denial of service. The Microsoft SQL Server, PostgreSQL, and MySQL data sources are affected.