Medium severity5.3NVD Advisory· Published Jul 23, 2026· Updated Jul 23, 2026
CVE-2026-21723
CVE-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.
Affected products
3- osv-coords2 versions
>= 8.0.0, < 11.6.11+ 1 more
- (no CPE)range: >= 8.0.0, < 11.6.11
- (no CPE)range: < 12.4.5-4.1
Patches
Vulnerability mechanics
References
1News mentions
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