CVE-2026-21727

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

State: Published
Severity: 3.3 Low
Published: Apr 15, 2026
Updated: Aug 27, 2026
Reserved: Jan 5, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	3.3 Low	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N	GRAFANA

Weaknesses

CWE-732 Incorrect Permission Assignment for Critical Resource

Affected Products

Product	Versions
Grafana CorrelationsGrafana	10.2.0 to before 12.4.0Affected

References

https://grafana.com/security/security-advisories/cve-2026-21727vendor-advisory

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.