CVE-2026-21727: Grafana

Low severity, CVSS 3.3. EPSS: 0.2% chance of exploitation in the next 30 days.

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 products

• Grafana Grafana: before 11.6.11 (fixed in 11.6.11); from 12.0.0, before 12.0.9 (fixed in 12.0.9); from 12.1.0, before 12.1.6 (fixed in 12.1.6); from 12.2.0, before 12.2.4 (fixed in 12.2.4); from 12.3.0, before 12.3.3 (fixed in 12.3.3)

Published 2026-04-15. Last modified 2026-08-19.