CVE-2026-21727: Grafana Correlations: Cross-Tenant Data Disclosure and Permanent Deletion via Legacy org_id=0 Record

Published Apr 15, 2026

Updated

--- 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 cvssscore: "3.3" cvssvector: "CVSS:3.3/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N" fixedversions: - ">=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 orgid = 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.

Affected Software

6 affected components

Grafana Labs Grafana<10.2, <11.6.11, <12.0.9, <12.1.6, <12.2.4

Grafana Grafana<11.6.11

Grafana Grafana>=12.0.0<12.0.9

Grafana Grafana>=12.1.0<12.1.6

Grafana Grafana>=12.2.0<12.2.4

Grafana Grafana>=12.3.0<12.3.3

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade Grafana Correlations to a version that resolves this vulnerability.
Fixed in >=11.6.11
Upgrade
Upgrade Grafana Correlations to a version that resolves this vulnerability.
Fixed in >=12.0.9
Upgrade
Upgrade Grafana Correlations to a version that resolves this vulnerability.
Fixed in >=12.1.6
Upgrade
Upgrade Grafana Correlations to a version that resolves this vulnerability.
Fixed in >=12.2.4

Event History

Apr 15, 2026

CVE Published

via MITRE·06:57 PM

Data Sourced

via MITRE·06:57 PM

DescriptionSeverity

Data Sourced

via NVD·08:16 PM

DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

What is the severity of CVE-2026-21727?

CVE-2026-21727 is considered a high severity vulnerability due to potential cross-tenant data disclosure and unauthorized deletion of records.

How do I fix CVE-2026-21727?

To fix CVE-2026-21727, it is recommended to upgrade to Grafana versions later than 12.2.4.

What software is affected by CVE-2026-21727?

CVE-2026-21727 affects Grafana versions up to 10.2 and from 11.0 up to 12.2.4.

What is the main impact of CVE-2026-21727?

The main impact of CVE-2026-21727 is the risk of cross-tenant data disclosure and the possibility of permanent deletion of sensitive data.

Is CVE-2026-21727 related to data security?

Yes, CVE-2026-21727 is directly related to data security as it allows for potential unauthorized access and deletion of data across different tenants.