---
id: CVE-2026-21727
title: >-
  A cross-tenant isolation vulnerability was found in Grafana’s Correlations
  feature affecting legacy correlation records
summary: >-
  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 wi…
severity: low
cvss: 3.3
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-732
vendor: grafana
product: grafana
affected:
  - grafana < 11.6.11
  - 'grafana >= 12.0.0, < 12.0.9'
  - 'grafana >= 12.1.0, < 12.1.6'
  - 'grafana >= 12.2.0, < 12.2.4'
  - 'grafana >= 12.3.0, < 12.3.3'
patched:
  - grafana 12.3.3
published: '2026-04-15'
updated: '2026-08-19'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-21727'
references:
  - url: 'https://grafana.com/security/security-advisories/cve-2026-21727'
    label: security@grafana.com
tags:
  - nvd
epss: 0.00204
epssPercentile: 0.09228
ingestedAt: '2026-08-20T17:59:04.943Z'
---

## Overview

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.

## Affected

- `grafana < 11.6.11`
- `grafana >= 12.0.0, < 12.0.9`
- `grafana >= 12.1.0, < 12.1.6`
- `grafana >= 12.2.0, < 12.2.4`
- `grafana >= 12.3.0, < 12.3.3`

## Remediation

Upgrade past the affected range:

- `grafana 12.3.3`