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

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Summary

CVECVE-2026-21727
StatePUBLISHED
AssignerGRAFANA
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-15 20:16:34 UTC
Updated2026-04-20 20:08:04 UTC
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.

Risk And Classification

Primary CVSS: v3.1 3.3 LOW from [email protected]

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

EPSS: 0.000100000 probability, percentile 0.011500000 (date 2026-04-21)

Problem Types: CWE-732 | CWE-732 CWE-732 Incorrect Permission Assignment for Critical Resource

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.3LOWCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N
3.1CNADECLARED3.3LOWCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Grafana Grafana All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Grafana Grafana Correlations affected 10.2.0 12.4.0 semver OnPrem

References

ReferenceSourceLinkTags
grafana.com/security/security-advisories/cve-2026-21727 [email protected] grafana.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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