Grafana Loki datasource plugin's callResource handler contains a path traversal vulnerability.
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-42129US | — | — | ||
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… | ||||
02
references
External citations — patches, advisories, analysis.
- https://github.com/grafana/grafanaPACKAGE
- https://github.com/grafana/grafana/commit/3fcdbc5a6e5c955bd42bd3715dd03cbad2b078c1WEB
- https://github.com/grafana/grafana/commit/42cdc39124912a8506a0c613c319c345aa950b29WEB
- https://github.com/grafana/grafana/commit/82ef13993059351bf21de35b8488bbd9b42df4f4WEB
- https://github.com/grafana/grafana/commit/d27d2eba9c509d16f214d290436a6ad0bd9c6c01WEB
- https://github.com/grafana/grafana/commit/dd5dc51681ff0133ddb2e206c2ea318713aeca16WEB
- https://github.com/grafana/grafana/commit/eeb08ceb020c4381242d8400e5878044e9877505WEB
- https://github.com/grafana/grafana/commit/f70d3e480274a5dbd12006338c393f4b05d441caWEB
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