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CVE-2026-21723— CVE-2026-21723 Record

Quick assessment

Affected
Grafana Grafana OSS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Grafana OSS是Grafana公司开源的一个可视化仪表盘。 Grafana OSS 8.0.0版本至11.0.0版本、11.0.0版本至11.6.10版本、12.0.0版本至12.0.9版本、12.1.0版本至12.1.6版本、12.2.0版本至12.2.4版本、12.3.0版本至12.3.2版本存在安全漏洞，该漏洞源于alertmanager模板测试端点/api/alertmanager/grafana/config/api/v1/templates/test在执行模板时无内存限制，导致短时间内

CVSS 5.3 · Medium EPSS 0.33% · P23

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 6

VendorProduct Version RangeStatus
Grafana Grafana OSS 8.0.0≤ 11.0.0 affected
11.0.0≤ 11.6.10 affected
12.0.0≤ 12.0.9 affected
12.1.0≤ 12.1.6 affected
12.2.0≤ 12.2.4 affected
12.3.0≤ 12.3.2 affected
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I. Basic Information for CVE-2026-21723

Vulnerability Information
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Vulnerability Title
CVE-2026-21723 Record
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Grafana OSS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Grafana OSS是Grafana公司开源的一个可视化仪表盘。 Grafana OSS 8.0.0版本至11.0.0版本、11.0.0版本至11.6.10版本、12.0.0版本至12.0.9版本、12.1.0版本至12.1.6版本、12.2.0版本至12.2.4版本、12.3.0版本至12.3.2版本存在安全漏洞，该漏洞源于alertmanager模板测试端点/api/alertmanager/grafana/config/api/v1/templates/test在执行模板时无内存限制，导致短时间内
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Grafana Grafana OSS 8.0.0 ~ 11.0.0 -

II. Public POCs for CVE-2026-21723

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III. Intelligence Information for CVE-2026-21723

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Vendor Advisories for CVE-2026-21723 (1)

IV. Related Vulnerabilities

Same product: Grafana OSS
Same vendor: Grafana

V. Comments for CVE-2026-21723

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