CVE-2026-21727
Grafana Correlations: Cross-Tenant Data Disclosure and Permanent Deletion via Legacy org_id=0 Record
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Grafana Correlations: Cross-Tenant Data Disclosure and Permanent Deletion via Legacy org_id=0 Record
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.
- Record
CVE-2026-21727- CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-732
- Updated
- 2026-11-02
EUVDEUVD-2026-23011
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.
- Record
EUVD-2026-23011- CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-p5x9-j974-rpfp
Grafana legacy correlations allow cross-tenant disclosure and deletion
hero: image: /static/img/heros/hero-legal2.svg content: "# Cross-Tenant Legacy Correlation Disclosure and Deletion" date: 2026-01-29 product: Grafana 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.
- Record
GHSA-p5x9-j974-rpfp- CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-732
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-21727- CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-732
- Updated
- 2026-11-02
OSV
Grafana Correlations: Cross-Tenant Data Disclosure and Permanent Deletion via Legacy org_id=0 Record
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.
- Record
CVE-2026-21727- CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
OSVGHSA-p5x9-j974-rpfp
Grafana legacy correlations allow cross-tenant disclosure and deletion
hero: image: /static/img/heros/hero-legal2.svg content: "# Cross-Tenant Legacy Correlation Disclosure and Deletion" date: 2026-01-29 product: Grafana 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.
- Record
GHSA-p5x9-j974-rpfp- CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-732
- Updated
- 2026-11-02
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OSVUBUNTU-CVE-2026-21727
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.
- Record
UBUNTU-CVE-2026-21727- CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
OSVBIT-grafana-2026-21727 No score
Grafana Correlations: Cross-Tenant Data Disclosure and Permanent Deletion via Legacy org_id=0 Record
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.
- Record
BIT-grafana-2026-21727- Updated
- 2026-11-02
OSVCLSA-2026-1789289678 No score
grafana: Fix of 3 CVEs
- CVE-2026-21727: drop the org_id = 0 backward-compatibility condition from the correlations read and delete paths so legacy correlation records created before Grafana 10.2 can no longer be read or deleted across organizations
- Record
CLSA-2026-1789289678- Updated
- 2026-11-02
OSVGO-2026-6664 No score
Grafana legacy correlations allow cross-tenant disclosure and deletion in github.com/grafana/grafana
Grafana legacy correlations allow cross-tenant disclosure and deletion in github.com/grafana/grafana.
NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.
(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)
The additional affected modules and versions are: github.com/grafana/grafana before v1.9.2-0.20260127141016-e702db6096e0.
- Record
GO-2026-6664- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/grafana/grafanaGo |
before 1.9.2-0.20260127141016-e702db6096e0 | 1.9.2-0.20260127141016-e702db6096e0 |
grafanaBitnami |
before 11.6.11, 12.0.0 up to 12.0.9, 12.1.0 up to 12.1.6, 12.2.0 up to 12.2.4, 12.3.0 up to 12.3.3 | 11.6.1112.0.912.1.612.2.412.3.3 |
grafanaTuxCare:AlmaLinux:9.6 |
before 10.2.6-15.el9_6.tuxcare.els17 | 10.2.6-15.el9_6.tuxcare.els17 |
grafana-selinuxTuxCare:AlmaLinux:9.6 |
before 10.2.6-15.el9_6.tuxcare.els17 | 10.2.6-15.el9_6.tuxcare.els17 |
github.com/grafana/grafanaGo |
All versions | None known |
grafanaUbuntu:16.04:LTS |
All versions, plus listed versions 2.6.0+dfsg-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-21727 is a low vulnerability (CVSS 3.3) in Grafana, published April 15, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 10th percentile. Fixed in github.com/grafana/grafana 1.9.2-0.20260127141016-e702db6096e0.
References
grafana.com/security/security-advisories/cve-2026-21727
nvd.nist.gov/vuln/detail/CVE-2026-21727
github.com/grafana/grafana/commit/2b2847625b8a77ba47128ccb5ecbcd72542cb9bc
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errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1789289678.html
ubuntu.com/security/CVE-2026-21727
cve.org/CVERecord?id=CVE-2026-21727