low3.3
CVE-2026-21727
A cross-tenant isolation vulnerability was found in Grafana’s Correlations feature affecting legacy correlation records.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/grafana/grafana | < 1.9.2-0.20260127141016-e702db6096e0 | 1.9.2-0.20260127141016-e702db6096e0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Grafana | Grafana | before 11.6.11 from 12.0.0 before 12.0.9 from 12.1.0 before 12.1.6 from 12.2.0 before 12.2.4 from 12.3.0 before 12.3.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-p5x9-j974-rpfp
- https://nvd.nist.gov/vuln/detail/CVE-2026-21727
- https://grafana.com/security/security-advisories/cve-2026-21727
- https://github.com/grafana/grafana/commit/2b2847625b8a77ba47128ccb5ecbcd72542cb9bc
- https://github.com/grafana/grafana/commit/2cf0dd6fde3f5a2b92864e2376ae5378c7df45e2
- https://github.com/grafana/grafana/commit/4010ee30bb441bc399a1f37bdc8ab55ec909f3b7
- https://github.com/grafana/grafana/commit/8e7ea333991d913298bd68d4787da9c6977a0a8c
- https://github.com/grafana/grafana/commit/a9a98fc4327182d1bdb9a74b5c2938d5c127e764
- https://github.com/grafana/grafana/commit/e702db6096e0509ff2825f732697f077e9e6289f