Vulnerability Report

CVE-2026-21727

Title: Grafana Cross-Tenant Legacy Correlation Disclosure and Deletion

Arbitrary File Access

Proof Of Concept

No public PoC currently indexed for CVE-2026-21727.

CWE Category NVD-CWE-noinfo

Published Date Apr 15, 2026

Modified Date Apr 20, 2026

Exploit Status Not Found

Score 3.3 CVSS v3.1

Exploit Probability (EPSS)

0.20%

Vulnerability Summary

CVE-2026-21727: --- 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.

Impacted Vendors

grafana 1

Reference Links

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

CVSS v3.1

Source Entity [email protected]

Severity LOW

3.3

Attack Vector

NETWORK

Complexity

HIGH

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns