CVE-2026-42129: CWE-22 in Grafana Grafana OSS
The Loki datasource plugin's callResource handler contains a path traversal vulnerability. An authenticated Viewer-role user can escape the plugin's resource sandbox and access administrative Loki endpoints (e.g. /config, /services, /ready) to extract sensitive backend configuration and internal service information.
AI Analysis
Technical Summary
This vulnerability (CWE-22) in Grafana OSS's Loki data source plugin permits a user with Viewer-level permissions to perform a path traversal attack. This attack enables unauthorized access to administrative Loki endpoints, potentially exposing sensitive backend configuration and internal service information. The vulnerability is present in 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 available at this time.
Potential Impact
An attacker with only Viewer permissions can exploit this vulnerability to read sensitive backend configuration and internal service information by accessing administrative Loki endpoints. This 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. Until a fix is available, restrict Viewer permissions to trusted users only and monitor for suspicious activity related to Loki data source plugin access.
CVE-2026-42129: CWE-22 in Grafana Grafana OSS
Description
The Loki datasource plugin's callResource handler contains a path traversal vulnerability. An authenticated Viewer-role user can escape the plugin's resource sandbox and access administrative Loki endpoints (e.g. /config, /services, /ready) to extract sensitive backend configuration and internal service information.
CVSS v3.1
Score 7.7high
Affected software
Grafana
Grafana OSS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-22) in Grafana OSS's Loki data source plugin permits a user with Viewer-level permissions to perform a path traversal attack. This attack enables unauthorized access to administrative Loki endpoints, potentially exposing sensitive backend configuration and internal service information. The vulnerability is present in 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 available at this time.
Potential Impact
An attacker with only Viewer permissions can exploit this vulnerability to read sensitive backend configuration and internal service information by accessing administrative Loki endpoints. This 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. Until a fix is available, restrict Viewer permissions to trusted users only and monitor for suspicious activity related to Loki data source plugin access.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GRAFANA
- Date Reserved
- 2026-04-24T15:38:08.067Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a393e89eed863c81ee5cd3b
Added to database: 06/22/2026, 13:54:17 UTC
Last enriched: 08/11/2026, 13:41:12 UTC
Last updated: 09/22/2026, 02:04:04 UTC
Views: 252
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