Home/CVE/--- title: Cross-Tenant Legacy Correlation Disclosure and Deletion draft: false hero: image: /static/img/heros/hero-le
CVE

CVE-2026-21727

--- title: Cross-Tenant Legacy Correlation Disclosure and Deletion draft: false hero: image: /static/img/heros/hero-le

--- 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.

LOW · CVSS 3.3 EPSS 0.00018
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-732Incorrect Permission Assignment for Critical Resource
▤

Affected Products & Versions

5
grafana< 11.6.11
grafana>= 12.0.0 and < 12.0.9
grafana>= 12.1.0 and < 12.1.6
grafana>= 12.2.0 and < 12.2.4
grafana>= 12.3.0 and < 12.3.3
▣

Scoring & Timeline

3.3
LOW · CVSS v3.1 · security@grafana.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Apr 2026 · 08:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://grafana.com/security/security-advisories/cve-2026-21727Vendor Advisory
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