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

> CVE-2026-21727: Grafana Correlations: Cross-Tenant Data Disclosure and Permanent Deletion via Legacy org_id=0 Record. CVSS 3.3 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-21727
Last updated: 2026-08-27T17:22:44Z

- Published: 2026-04-15 18:57 UTC · Updated: 2026-08-27 17:22 UTC · Assigner: GRAFANA
- CVSS: 3.3 (CVSS 3.1) · Severity: Low · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N
- EPSS: 0.20%, 10th percentile (scored 2026-10-25)
- CISA KEV: no

## Description

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 vendors and products

- Grafana: Grafana Correlations

## Tracked companies

- [Grafana Cloud](https://rewindex.com/company/grafana-cloud.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-21727)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-21727)
- [https://grafana.com/security/security-advisories/cve-2026-21727](https://grafana.com/security/security-advisories/cve-2026-21727)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-21727 · Markdown: https://rewindex.com/cve/CVE-2026-21727.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-21727 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T04:06:19.370Z