Grafana Data Source Plugin: DoS (OOM) via Negative Interval Injection in $__timeGroup Macro
Medium
- Advisory ID:
- CVE-2026-33378
- Published:
- 2026-05-13
- Product:
- Grafana
- 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:
- >=11.6.14+security-04>=12.2.8+security-04>=12.3.6+security-04>=12.4.3+security-02>=13.0.1+security-01
Summary
Using the $__timeGroup macro, one can achieve an OOM by overloading the server. This requires a SQL datasource. If the server is set up to auto-restart, the impact is minimal or non-existent, as the attack can take upwards of half an hour to crash the server.
This vulnerability was reported via our bug bounty program.