Vulnerability · Published Jul 23, 2026 · Assigned by GRAFANA
CVE-2026-21723CVE-2026-21723 Record
Medium 5.3
In plain English
A medium-severity uncontrolled resource consumption in Grafana OSS from Grafana. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.2%top 88.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Grafana | Grafana OSS | 8.0.0 – through 11.0.011.0.0 – through 11.6.1012.0.0 – through 12.0.912.1.0 – through 12.1.612.2.0 – through 12.2.412.3.0 – through 12.3.2 |
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- https://grafana.com/security/security-advisories/cve-2026-21723 vendor-advisory