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CVE-2026-21723

CVE-2026-21723 Record PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
Grafana / Grafana OSSaffected 8.0.0 through 11.0.0; affected 11.0.0 through 11.6.10; affected 12.0.0 through 12.0.9; affected 12.1.0 through 12.1.6; affected 12.2.0 through 12.2.4; affected 12.3.0 through 12.3.2

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.