CVE-2026-21723

CVSS Score & Metrics

Base Score

5.3 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H                                    

Vulnerability 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.

Vulnerability Details

Published Date

July 23, 2026

Last Modified

July 23, 2026

Source

NVD

Vendor

Grafana

Product

Grafana OSS

External References

https://grafana.com/security/security-advisories/cve-2026-21723

CVSS Score & Metrics

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