Unbounded memory allocation in the Prometheus rule conversion API
Medium
- Advisory ID:
- CVE-2026-33374
- Published:
- 2026-10-13
- 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:
- <12.0.0>=12.4.13 <13.0.0>=13.0.11 <13.1.0>=13.1.8 <13.2.0>=13.2.4
Summary
The Prometheus rule conversion API endpoints in Grafana do not limit request body size, allowing authenticated users to trigger unbounded memory allocations that can crash the server through out-of-memory conditions.