CVE-2026-21727— Grafana Correlations: Cross-Tenant Data Disclosure and Permanent Deletion via Legacy org_id=0 Record
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I. Basic Information for CVE-2026-21727
Vulnerability Information
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Vulnerability Title
Grafana Correlations: Cross-Tenant Data Disclosure and Permanent Deletion via Legacy org_id=0 Record
Source: NVD (National Vulnerability Database)
Vulnerability Description
--- title: Cross-Tenant Legacy Correlation Disclosure and Deletion draft: false hero: image: /static/img/heros/hero-legal2.svg content: "# Cross-Tenant Legacy Correlation Disclosure and Deletion" date: 2026-01-29 product: Grafana severity: Low cve: CVE-2026-21727 cvss_score: "3.3" cvss_vector: "CVSS:3.3/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N" 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Grafana 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Grafana是Grafana开源的一套提供可视化监控界面的开源监控工具。该工具主要用于监控和分析Graphite、InfluxDB和Prometheus等。 Grafana存在安全漏洞，该漏洞源于跨租户遗留关联问题，可能导致绕过访问限制并读取敏感信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Grafana | Grafana Correlations | 10.2.0 ~ 12.4.0 | - |
II. Public POCs for CVE-2026-21727
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Grafana · 2026-04-15 · 4 CVEs total
| CVE-2025-41118 | 9.1 CRITICAL | Sensitive COS `SecretKey` exposed in plaintext via configuration API due to missing type p |
| CVE-2026-21726 | 5.3 MEDIUM | Loki Path Traversal - CVE-2021-36156 Bypass |
| CVE-2025-12141 | Grafana Alerting Editors can edit destination of webhooks they did not create |
IV. Related Vulnerabilities
Same vendor: Grafana
- CVE-2026-21728
Tempo query limit results in unbounded memory allocation - CVE-2026-21726
Loki Path Traversal - CVE-2021-36156 Bypass - CVE-2025-41118
Sensitive COS `SecretKey` exposed in plaintext via configura - CVE-2025-12141
Grafana Alerting Editors can edit destination of webhooks th - CVE-2026-27879
Query resampling can cause unbounded memory allocations
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