SEPTEMBER 20, 2026
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Case File

CVE-2026-21723

MEDIUM · CVSS 5.3 EPSS 0.20% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-23 · Last synced 2026-08-22

CyberRota Analysis

AI-Generated

The alertmanager templates test endpoint in Grafana is vulnerable to mass template execution, which can lead to out-of-memory (OOM) conditions and crash the service. This issue can be exploited with minimal privileges, particularly if anonymous access is enabled, making it a concern for organizations using Grafana in environments where such access is permitted. Administrators should prioritize addressing this vulnerability to prevent potential service disruptions.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-21723
Severity
MEDIUM
CVSS
5.3
EPSS
0.20%

Original NVD 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.