---
id: "CVE-2026-21727"
kind: "vulnerability"
aliases: ["CVE-2026-21727", "GHSA-p5x9-j974-rpfp", "GO-2026-6664"]
title: "Grafana legacy correlations allow cross-tenant disclosure and deletion in github.com/grafana/grafana"
severity: "low"
cvss: 3.3
epss: 0.00204
exploited: false
status: "open"
category: "package"
products: [{"name": "github.com/grafana/grafana", "fixed": [], "affected": "all versions", "ecosystem": "go"}]
ecosystems: ["go"]
tags: ["grafana", "multi-tenant", "package", "self-hosted"]
not_affected_if: ["no-pre-10.2-correlations", "patched-version", "single-org"]
published_at: "2026-04-15T20:16:34+00:00"
first_seen_at: "2026-10-23T19:13:08+00:00"
updated_at: "2026-10-23T21:49:20+00:00"
sources: [{"source": "govuln", "url": "https://pkg.go.dev/vuln/GO-2026-6664", "first_seen_at": "2026-10-23T19:13:08+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-21727", "first_seen_at": "2026-10-23T19:13:43+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21727", "first_seen_at": "2026-10-23T19:35:23+00:00"}]
---

# Grafana legacy correlations allow cross-tenant disclosure and deletion in github.com/grafana/grafana

Grafana's Correlations feature returns legacy correlation records with org_id = 0 across organizations, so a user with datasource management rights can read and permanently delete another organization's legacy correlation data. The sources rate it low (CVSS 3.3) and EPSS 0.002, with no known exploitation.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- go:github.com/grafana/grafana affected all versions fixed ?

## How to check

Check whether any correlations were created before Grafana 10.2 (legacy org_id = 0 rows) in a multi-organization instance; the sources do not give a specific query or file.

## Fix

Upgrade Grafana to 11.6.11, 12.0.9, 12.1.6, or 12.2.4 or later, matching your release line.

## Timeline

- 2026-10-23T19:13:08+00:00 govuln https://pkg.go.dev/vuln/GO-2026-6664
- 2026-10-23T19:13:43+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-21727
- 2026-10-23T19:35:23+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-21727

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_