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.