CVE-2026-21727Network attack vector

Cross-tenant disclosure and deletion via legacy records

Published Apr 15, 2026 · Updated Apr 15, 2026

Cross-tenant isolation failure in Grafana Correlations allows remote authenticated users to read and permanently delete legacy records. A backward-compatibility query returns org_id = 0 correlation rows across organization boundaries instead of restricting them to the active tenant. Reachability requires datasource-management privileges and legacy correlations created before Grafana 10.2; exposure is limited to reading and deleting those records.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-tenant isolation failure in Grafana Correlations allows remote authenticated users to read and permanently delete legacy records. A backward-compatibility query returns org_id = 0 correlation rows across organization boundaries instead of restricting them to the active tenant. Reachability requires datasource-management privileges and legacy correlations created before Grafana 10.2; exposure is limited to reading and deleting those records.

The record

CVE
CVE-2026-21727
Published
Apr 15, 2026
Updated
Apr 15, 2026
Vendor
Grafana Labs
Product
Grafana Correlations
Classifications
CWE-732
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.2.0 <12.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Grafana Labs · Grafana Correlationsversion=10.2.0 <12.4.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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