Is CVE-2026-21727 in the CISA KEV catalog?

No. CVE-2026-21727 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-21727?

CVE-2026-21727 has a CVSS v3 base score of 3.3 (LOW).

What is the EPSS score for CVE-2026-21727?

CVE-2026-21727 has an EPSS score of 0.20% (10th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-21727?

Upgrade GrafanaEnterprise to 11.6.11 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2026-21727

LOW

3.3

CVSS v3

NVD

Description

--- title: Cross-Tenant Legacy Correlation Disclosure and Deletion draft: false hero: image: /static/img/heros/hero-legal2.svg content: "# Cross-Tenant Legacy Correlation Disclosure and Deletion" date: 2026-01-29 product: Grafana severity: Low cve: CVE-2026-21727 cvss_score: "3.3" cvss_vector: "CVSS:3.3/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N" fixed_versions: - ">=11.6.11 >=12.0.9 >=12.1.6 >=12.2.4" --- A cross-tenant isolation vulnerability was found in Grafana’s Correlations feature affecting legacy correlation records. Due to a backward compatibility condition allowing org_id = 0 records to be returned across organizations, a user with datasource management privileges could read and permanently delete legacy correlation data belonging to another organization. This issue affects correlations created prior to Grafana 10.2 and is fixed in >=11.6.11, >=12.0.9, >=12.1.6, and >=12.2.4. Thanks to Gyu-hyeok Lee (g2h) for reporting this vulnerability.

CWE-732Incorrect Permission Assignment for Critical Resource

How to fix

Remediation Available

GrafanaEnterpriseWindows application

Affected:11.6.11Fixed in:11.6.11Grafana Labs

Affected:12.2.0 12.2.4Fixed in:12.2.4Grafana Labs

Affected:12.3.0 12.3.3Fixed in:12.3.3Grafana Labs

Affected:12.0.0 12.0.9Fixed in:12.0.9Grafana Labs

Affected:12.1.0 12.1.6Fixed in:12.1.6Grafana Labs

GrafanaOSSWindows application

Affected:12.3.0 12.3.3Fixed in:12.3.3Grafana Labs

Affected:12.1.0 12.1.6Fixed in:12.1.6Grafana Labs

Affected:11.6.11Fixed in:11.6.11Grafana Labs

Affected:12.0.0 12.0.9Fixed in:12.0.9Grafana Labs

Affected:12.2.0 12.2.4Fixed in:12.2.4Grafana Labs

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.20%probability of exploitation in 30 days

10thpercentile

Low risk: more likely to be exploited than 10% of all known CVEs.

References

Vendor Advisory1

grafana.com

Related Vulnerabilities

Other CWE-732 (Incorrect Permission Assignment for Critical Resource) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2011-3923	Critical	9.8	89%	-	Fix
CVE-2018-15379	Critical	9.8	86%	-	-
CVE-2018-1000207	High	7.2	64%	-	-
CVE-2023-32986	High	8.8	63%	-	-
CVE-2021-44521	Critical	9.1	55%	-	Fix
CVE-2018-13374	Medium	4.3	38%	KEV + Ransom	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-20.