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HIGH

CVE-2026-21721

CVSS v3

8.1

HIGH

EPSS Score

0.7 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • grafanaBitnamifrom 10.2.0 · fixed in 11.6.9
  • grafanaAlmaLinux:10all versions · fixed in 10.2.6-22.el10_1and 1 other package
  • grafanaAlmaLinux:9all versions · fixed in 10.2.6-18.el9_7and 1 other package

Vendor advisories

  • CVE-2026-21721 Red Hat Product Security84 products fixed · 9 known affected

    grafana/grafana/pkg/services/dashboards: Grafana Dashboard Permissions Scope Bypass Enables Cross‑Dashboard Privilege Escalation

    multicluster-globalhub/multicluster-globalhub-grafana-rhel9 as a component of Multicluster Global Hub · rhceph/grafana-rhel9 as a component of Red Hat Ceph Storage 5 · rhel8/grafana as a component of Red Hat Ceph Storage 5

  • RHSA-2026:79243 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat Ceph Storage

  • RHSA-2026:41064 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.11.10 security update

  • RHSA-2026:8229 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.13.6 security update

  • RHSA-2026:5633 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.12.8 security update

  • RHSA-2026:3529 Red Hat Product Security17 products fixed

    Red Hat Security Advisory: grafana security update

3 more advisories

Full record on NVD

Description

The dashboard permissions API does not verify the target dashboard scope and only checks the dashboards.permissions:* action. As a result, a user who has permission management rights on one dashboard can read and modify permissions on other dashboards. This is an organization‑internal privilege escalation.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Published
2026-01-27
Last Modified
2026-04-20

Frequently asked questions

What is CVE-2026-21721?

The dashboard permissions API does not verify the target dashboard scope and only checks the dashboards.permissions:* action. As a result, a user who has permission management rights on one dashboard can read and modify permissions on other dashboards. This is an organization‑internal privilege escalation.

Is CVE-2026-21721 actively exploited?

Active exploitation of CVE-2026-21721 has not been confirmed. Its EPSS score was 0.7% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-21721?

CVE-2026-21721 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

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Same product first, then the same vendor advisory and the same publication week.

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