CVE-2026-21723

mediumpriority · track · 0EPSS 0.003 · 25 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.33% (25th) EPSS

CVSS 5.3 · medium

Is it mine?

25 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-21

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

Technical severity, 0–10. One row per scoring source.

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.3mediumAV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.15.3mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.15.3mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · security@grafana.comexploitability 1.6 · impact 3.6

v3.14.9mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400USCWE-400US

affected products (25)

Products and version ranges known to be affected.

SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Grafana Grafana< 11.6.11cert_bundDE
Grafana Grafana< 12.0.10cert_bundDE
Grafana Grafana< 12.1.7cert_bundDE
Grafana Grafana< 12.2.5cert_bundDE
Grafana Grafana< 12.3.3cert_bundDE
Grafana Grafana OSS≤ 12.3.0 ≤12.3.2enisa_euvdEU
Grafana Grafana OSS≤ 8.0.0 ≤11.0.0enisa_euvdEU
Grafana Grafana OSS≤ 12.1.0 ≤12.1.6enisa_euvdEU
Grafana Grafana OSS≤ 11.0.0 ≤11.6.10enisa_euvdEU
Grafana Grafana OSS≤ 12.2.0 ≤12.2.4enisa_euvdEU
Grafana Grafana OSS≤ 12.0.0 ≤12.0.9enisa_euvdEU
Grafana Labs Grafana≤ 11.6.11fstec_bduRU
Grafana Labs Grafana≤ 12.1.7fstec_bduRU
Grafana Labs Grafana≤ 12.0.10fstec_bduRU
Grafana Labs Grafana≤ 12.3.3fstec_bduRU
Grafana Labs Grafana≤ 12.2.5fstec_bduRU
ООО «Ред Софт» РЕД ОС≤ 8.0fstec_bduRU
ООО «Ред Софт» РЕД ОС≤ 7.3fstec_bduRU

showing 20 of 25

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2490Grafana: Schwachstelle ermöglicht Denial of ServiceDeutsch2026-07-22csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Grafana ausnutzen, um einen Denial of Service Angriff durchzuführen.
BIT-grafana-2026-21723CVE-2026-21723 Record2026-07-29vendor · osvUS
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.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund osv NVD CVE.org MITRE

published 2026-07-23modified 2026-08-21

references (3)

External citations — patches, advisories, analysis.

scry

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