CVE-2026-42129: CWE-22 in Grafana Grafana OSS
A user with Viewer permissions can use a path traversal in the Loki data source plugin to reach administrative Loki endpoints and read sensitive backend configuration and internal service information.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-42129) involves a path traversal issue (CWE-22) in the Loki data source plugin of Grafana OSS. It allows a user with Viewer-level permissions to bypass intended access controls and reach administrative Loki endpoints. Through this unauthorized access, the attacker can read sensitive backend configuration files and internal service information. The vulnerability affects Grafana OSS versions 11.6.0, 12.2.0, 12.3.0, 12.4.0, and 13.0.0. There is no vendor advisory or patch information currently available, and no known exploits in the wild have been reported.
Potential Impact
An attacker with only Viewer permissions can exploit this vulnerability to access sensitive backend configuration and internal service information by leveraging a path traversal flaw in the Loki data source plugin. This exposure could lead to information disclosure that may aid further attacks or compromise of the system. The vulnerability does not impact integrity or availability directly but has a high confidentiality impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or temporary mitigation is currently documented, organizations should monitor Grafana's official channels for updates. Restricting Viewer permissions to trusted users and limiting access to the Loki data source plugin may reduce risk until a fix is available.
CVE-2026-42129: CWE-22 in Grafana Grafana OSS
Description
A user with Viewer permissions can use a path traversal in the Loki data source plugin to reach administrative Loki endpoints and read sensitive backend configuration and internal service information.
CVSS v3.1
Score 7.7high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-42129) involves a path traversal issue (CWE-22) in the Loki data source plugin of Grafana OSS. It allows a user with Viewer-level permissions to bypass intended access controls and reach administrative Loki endpoints. Through this unauthorized access, the attacker can read sensitive backend configuration files and internal service information. The vulnerability affects Grafana OSS versions 11.6.0, 12.2.0, 12.3.0, 12.4.0, and 13.0.0. There is no vendor advisory or patch information currently available, and no known exploits in the wild have been reported.
Potential Impact
An attacker with only Viewer permissions can exploit this vulnerability to access sensitive backend configuration and internal service information by leveraging a path traversal flaw in the Loki data source plugin. This exposure could lead to information disclosure that may aid further attacks or compromise of the system. The vulnerability does not impact integrity or availability directly but has a high confidentiality impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or temporary mitigation is currently documented, organizations should monitor Grafana's official channels for updates. Restricting Viewer permissions to trusted users and limiting access to the Loki data source plugin may reduce risk until a fix is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GRAFANA
- Date Reserved
- 2026-04-24T15:38:08.067Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a393e89eed863c81ee5cd3b
Added to database: 06/22/2026, 13:54:17 UTC
Last enriched: 08/02/2026, 20:35:04 UTC
Last updated: 08/06/2026, 15:00:12 UTC
Views: 183
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