# CVE-2026-21727: Grafana legacy correlations allow cross-tenant disclosure and deletion

Source: https://junglewise.ai/threats/cve-2026-21727-grafana-legacy-correlations-allow-cross-tenant-disclosure-and  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-15. Updated: 2026-10-09  
License: CC BY 4.0 with a link back

CVE-2026-21727 · Severity: low · CVSS 3.3 · Published 2026-04-15

Grafana is an observability platform that organizations use to monitor and visualize metrics, logs, and traces. A vulnerability in Grafana's correlations feature allows a user with datasource management privileges to access and delete correlation data belonging to other organizations, compromising confidentiality and data integrity for multi-tenant deployments.

Technologies: [github.com/grafana/grafana (Go)](https://junglewise.ai/threats/technologies/github-com-grafana-grafana), [Grafana](https://junglewise.ai/threats/technologies/grafana-grafana). Vendors: [Go](https://junglewise.ai/threats/vendors/go), [Grafana](https://junglewise.ai/threats/vendors/grafana).

## Quick answers

**Is CVE-2026-21727 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-21727 being exploited in the wild.

**How severe is CVE-2026-21727?** Low severity, with a CVSS score of 3.3, published 15 April 2026.

**Which products and versions are affected?** github.com/grafana/grafana (Go) < 1.9.2-0.20260127141016-e702db6096e0, SEMVER:introduced=0, SEMVER:introduced=0,fixed=1.9.2-0.20260127141016-e702db6096e0; Grafana versions before 11.6.11, 12.0.9, 12.1.6, and 12.2.4.

**Is there a fix for CVE-2026-21727?** Yes. github.com/grafana/grafana (Go): upgrade to 1.9.2-0.20260127141016-e702db6096e0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-21727 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-21727?** Check whether you run github.com/grafana/grafana (Go) or Grafana at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/grafana/grafana (Go): upgrade to 1.9.2-0.20260127141016-e702db6096e0 or later

  ```sh
  go get github.com/grafana/grafana@v1.9.2-0.20260127141016-e702db6096e0
  ```


## Technical details

A cross-tenant isolation flaw in Grafana's Correlations feature allows org_id = 0 legacy correlation records created before Grafana 10.2 to be returned and modified across organizational boundaries. An authenticated attacker with datasource management privileges can exploit a backward compatibility condition to read and permanently delete correlation data from other tenants. The vulnerability requires high privilege level and involves network-based access.

## Affected products

- Grafana Grafana versions before 11.6.11, 12.0.9, 12.1.6, and 12.2.4

## Identifiers

- CVE-2026-21727
- BIT-GRAFANA-2026-21727
- GHSA-p5x9-j974-rpfp
- GO-2026-6664

## Timeline

- 2026-01-29: disclosed
- 2026-04-15: advisory

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