CVE-2026-21723 – CVE-2026-21723 Record

CVE ID :CVE-2026-21723

Published : July 23, 2026, 3:16 a.m. | 30 minutes ago

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.

Severity: 5.3 | MEDIUM

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