CVE-2026-21723

CVE-2026-21723CVE-2026-21723

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.

Scoring

CVSS 5.3 ()
VectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Last modified2026-07-23
Sourced from NVD. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.