How severe is CVE-2026-21721?

CVE-2026-21721 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-21721 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21721?

CVE-2026-21721 primarily affects Grafana. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-21721?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-21721 have an EU (EUVD) identifier?

Yes. CVE-2026-21721 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4820.

When was CVE-2026-21721 published?

CVE-2026-21721 was published on 2026-01-27 and last updated on 2026-06-30.

CVE-2026-21721

CVE-2026-21721 is a high-severity vulnerability in Grafana with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4820
Weakness: CWE-863
Affected product: Grafana
Published: 2026-01-27
Last modified: 2026-06-30

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.

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.
How severe is CVE-2026-21721?: CVE-2026-21721 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-21721 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21721?: CVE-2026-21721 primarily affects Grafana. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-21721?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-21721 have an EU (EUVD) identifier?: Yes. CVE-2026-21721 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4820.
When was CVE-2026-21721 published?: CVE-2026-21721 was published on 2026-01-27 and last updated on 2026-06-30.

References

Affected products (7)

cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*
cpe:2.3:a:grafana:grafana:11.6.9:-:*:*:*:*:*:*
cpe:2.3:a:grafana:grafana:12.0.8:-:*:*:*:*:*:*
cpe:2.3:a:grafana:grafana:12.1.5:-:*:*:*:*:*:*
cpe:2.3:a:grafana:grafana:12.2.3:-:*:*:*:*:*:*
cpe:2.3:a:grafana:grafana:12.3.0:*:*:*:*:*:*:*
cpe:2.3:a:grafana:grafana:12.3.1:-:*:*:*:*:*:*

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Other CWE-863 (Incorrect Authorization) vulnerabilities

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CVE-2026-46595 — Critical (CVSS 10.0): Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of…
CVE-2026-33105 — Critical (CVSS 10.0): Improper authorization in Microsoft Azure Kubernetes Service allows an unauthorized attacker to elevate privileges over…
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Threat intelligence

Threat-intel indicators referencing this CVE:

150.5.154.160 (ipv4-addr)
196.188.187.85 (ipv4-addr)
167.172.93.203 (ipv4-addr)
104.248.169.81 (ipv4-addr)
52.140.76.154 (ipv4-addr)
14.22.23.243 (ipv4-addr)