CVE-2026-21727

Description

--- 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 cvss_score: "3.3" cvss_vector: "CVSS:3.3/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N" fixed_versions: - ">=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 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.

How to fix CVE-2026-21727

To remediate CVE-2026-21727, upgrade the affected package to a fixed version below.

• —upgrade to 11.6.11 or later

Is CVE-2026-21727 being exploited?

Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• from 0, < 11.6.11, >= 12.0.0, < 12.0.9, >= 12.1.0, < 12.1.6, >= 12.2.0, < 12.2.4, >= 12.3.0, < 12.3.3

CVSS scores

References (2)

• WEBgrafana.com/security/security-advisories/cve-2026-21727
• WEBnvd.nist.gov/vuln/detail/CVE-2026-21727