CVE-2026-21723 Record

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-21723
StatePUBLISHED
AssignerGRAFANA
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-23 03:16:30 UTC
Updated2026-07-23 17:55:03 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

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

EPSS: 0.003270000 probability, percentile 0.250760000 (date 2026-07-23)

Problem Types: CWE-400 | CWE-400 CWE-400 Uncontrolled Resource Consumption

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Grafana Grafana OSS affected 8.0.0 11.0.0 semver Not specified
CNA Grafana Grafana OSS affected 11.0.0 11.6.10 semver Not specified
CNA Grafana Grafana OSS affected 12.0.0 12.0.9 semver Not specified
CNA Grafana Grafana OSS affected 12.1.0 12.1.6 semver Not specified
CNA Grafana Grafana OSS affected 12.2.0 12.2.4 semver Not specified
CNA Grafana Grafana OSS affected 12.3.0 12.3.2 semver Not specified

References

ReferenceSourceLinkTags
grafana.com/security/security-advisories/cve-2026-21723 [email protected] grafana.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: nacl (Researcher) (en)

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