Medium 5.3Published Jul 22, 2026

CVE-2026-21723CVE-2026-21723 Record

Updated under an hour ago (Oct 28, 2026, 3:50 AM ET)

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It affects Grafana OSS. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-400
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GRAFANA
NVD analysis: Deferred
Record last updated: Aug 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Grafana Grafana OSS grafana:oss (from the name)	from 8.0.0 through 11.0.0; from 11.0.0 through 11.6.10; from 12.0.0 through 12.0.9; from 12.1.0 through 12.1.6; from 12.2.0 through 12.2.4; from 12.3.0 through 12.3.2	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.