Detections
Analytics
CVE-2026-21723
medium
Description
The alertmanager templates test endpoint (/api/alertmanager/grafana/config/api/v1/templates/test) can execute templates with no memory limits. Mass-executing templates in a short period causes OOM and crashes the Grafana service. The endpoint requires very low privileges and is exploitable with anonymous access enabled.
References
https://grafana.com/security/security-advisories/cve-2026-21723