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TI-2026-17496 Aliases CVE-2026-21723GHSA-xcrm-48rh-35pj

CVE-2026-21723 Record

Priority LOW 23CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 1 fixed, 10 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00215 11th percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 1 fixed, 10 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GrafanaGrafana OSS8.0.0 – 11.0.0; 11.0.0 – 11.6.10; 12.0.0 – 12.0.9; 12.1.0 – 12.1.6; 12.2.0 – 12.2.4; 12.3.0 – 12.3.2—No fix listedCNA
  • Grafana OSS VendorGrafana Affected 8.0.0 – 11.0.0; 11.0.0 – 11.6.10; 12.0.0 – 12.0.9; 12.1.0 – 12.1.6; 12.2.0 – 12.2.4; 12.3.0 – 12.3.2 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*——Grafana
  • cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:* Versions — — ·Grafana

Remediation

Red Hat 3 advisories

  • RHSA-2026:65157 Released 2026-09-08 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images grafana12.4-12.4.10-0.1.hum1@aarch64, grafana12.4-12.4.10-0.1.hum1@src, grafana12.4-12.4.10-0.1.hum1@x86_64
  • RHSA-2026:63165 Released 2026-09-03 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images grafana13.1-13.1.3-0.5.hum1@aarch64, grafana13.1-13.1.3-0.5.hum1@src, grafana13.1-13.1.3-0.5.hum1@x86_64
  • RHSA-2026:63164 Released 2026-09-03 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images grafana13.2-13.2.1-0.1.hum1@aarch64, grafana13.2-13.2.1-0.1.hum1@src, grafana13.2-13.2.1-0.1.hum1@x86_64

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Multicluster Global HubAffectedNo fix yet: Fix deferred
Red Hat Advanced Cluster Management for Kubernetes 2AffectedNo fix yet: Fix deferred
Red Hat Ceph Storage 5AffectedNo fix yet: Fix deferred
Red Hat Ceph Storage 6AffectedNo fix yet: Fix deferred
Red Hat Ceph Storage 7AffectedNo fix yet: Fix deferred
Red Hat Ceph Storage 8AffectedNo fix yet: Fix deferred
Red Hat Ceph Storage 9AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat Hardened ImagesFixed RHSA-2026:63164, RHSA-2026:63165, RHSA-2026:65157
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-21723
  2. 2026-10-03 Alias added: GHSA-xcrm-48rh-35pj

References

Advisory 1

  • TI-2021-16611 Snapshot authentication bypass in grafana KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-19604 Grafana path traversal KEVCVSS 3.1HIGH 7.5
  • TI-2024-08600 Grafana SQL Expressions allow for remote code execution CVSS 4.0CRITICAL 9.4
  • TI-2023-02931 Authentication bypass by spoofing in Grafana CVSS 3.1CRITICAL 9.8
  • TI-2020-10491 The avatar feature in Grafana 3.0.1 through 7.0.1 has an SSRF Incorrect Access Control… CVSS 3.1HIGH 8.2
  • TI-2025-03662 Open redirect in Grafana CVSS 3.1HIGH 7.6
See all 174 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences