{"id":"CVE-2026-21727","title":"A cross-tenant isolation vulnerability was found in Grafana’s Correlations feature affecting legacy correlation records","summary":"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 wi…","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-732"],"vendor":"grafana","product":"grafana","affected":["grafana < 11.6.11","grafana >= 12.0.0, < 12.0.9","grafana >= 12.1.0, < 12.1.6","grafana >= 12.2.0, < 12.2.4","grafana >= 12.3.0, < 12.3.3"],"patched":["grafana 12.3.3"],"published":"2026-04-15","updated":"2026-08-19","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-21727","references":[{"url":"https://grafana.com/security/security-advisories/cve-2026-21727","label":"security@grafana.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21727"},{"url":"https://github.com/grafana/grafana/commit/2b2847625b8a77ba47128ccb5ecbcd72542cb9bc"},{"url":"https://github.com/grafana/grafana/commit/2cf0dd6fde3f5a2b92864e2376ae5378c7df45e2"},{"url":"https://github.com/grafana/grafana/commit/4010ee30bb441bc399a1f37bdc8ab55ec909f3b7"},{"url":"https://github.com/grafana/grafana/commit/8e7ea333991d913298bd68d4787da9c6977a0a8c"},{"url":"https://github.com/grafana/grafana/commit/a9a98fc4327182d1bdb9a74b5c2938d5c127e764"},{"url":"https://github.com/grafana/grafana/commit/e702db6096e0509ff2825f732697f077e9e6289f"},{"url":"https://github.com/advisories/GHSA-p5x9-j974-rpfp"},{"url":"https://github.com/grafana/grafana"}],"tags":["nvd","ghsa","go","osv"],"epss":0.00204,"epssPercentile":0.10297,"ingestedAt":"2026-08-20T17:59:04.943Z","aliases":["GHSA-p5x9-j974-rpfp","BIT-grafana-2026-21727","GO-2026-6664"],"ecosystem":"go","slug":"CVE-2026-21727","body":"## Overview\n\nA 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.\n\nThanks to Gyu-hyeok Lee (g2h) for reporting this vulnerability.\n\n## Affected\n\n- `grafana < 11.6.11`\n- `grafana >= 12.0.0, < 12.0.9`\n- `grafana >= 12.1.0, < 12.1.6`\n- `grafana >= 12.2.0, < 12.2.4`\n- `grafana >= 12.3.0, < 12.3.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `grafana 12.3.3`\n\n## Package advisory (CVE-2026-21727)\n\nAffected packages:\n\n- `github.com/grafana/grafana < 1.9.2-0.20260127141016-e702db6096e0`\n\nPatched in:\n\n- `github.com/grafana/grafana 1.9.2-0.20260127141016-e702db6096e0`\n\nSource: https://github.com/advisories/GHSA-p5x9-j974-rpfp","depth":"sunlit","depthScore":18,"depthScoreParts":{"impact":18.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}