CVE-2026-21727
Description
A flaw was found in Grafana. This cross-tenant isolation vulnerability affects legacy correlation records, specifically those created prior to Grafana 10.2. A user with datasource management privileges can exploit a backward compatibility condition, which allows records with an organization ID (org_id) of 0 to be returned across different organizations. This enables the user to read and permanently delete sensitive correlation data belonging to other organizations.
Statement
This Low impact cross-tenant isolation vulnerability in Grafana affects legacy correlation records created prior to Grafana 10.2. A user with datasource management privileges could read and permanently delete correlation data from other organizations due to a backward compatibility condition. Red Hat products utilizing Grafana with such legacy records are affected. Red Hat Product Seurity team has rated this vulnerability as having a Low severity, this is due the fact the attacker needs to have high privileges within the targeted Grafana instance and additionally the system needs to be making using of legacy correlation records limiting the confidentiality and integrity impact for the related records.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 3.8 | N/A | 3.3 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | High |
| Privileges Required | High | N/A | High |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | Low | N/A | Low |
| Integrity Impact | Low | N/A | Low |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
cve.org: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N
Understanding the Weakness (CWE)
Access Control
Technical Impact: Gain Privileges or Assume Identity; Bypass Protection Mechanism
The exploitation of a weakness in low-privileged areas of the software can be leveraged to reach higher-privileged areas without having to overcome any additional obstacles.
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