CVE-2026-42129: Grafana Loki datasource plugin's callResource handler contains a path traversal vulnerability.
(updated )
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.
References
- github.com/advisories/GHSA-f74p-cwhp-x2wx
- github.com/grafana/grafana/commit/3fcdbc5a6e5c955bd42bd3715dd03cbad2b078c1
- github.com/grafana/grafana/commit/42cdc39124912a8506a0c613c319c345aa950b29
- github.com/grafana/grafana/commit/82ef13993059351bf21de35b8488bbd9b42df4f4
- github.com/grafana/grafana/commit/d27d2eba9c509d16f214d290436a6ad0bd9c6c01
- github.com/grafana/grafana/commit/dd5dc51681ff0133ddb2e206c2ea318713aeca16
- github.com/grafana/grafana/commit/eeb08ceb020c4381242d8400e5878044e9877505
- github.com/grafana/grafana/commit/f70d3e480274a5dbd12006338c393f4b05d441ca
- github.com/grafana/grafana/releases/tag/v11.6.15
- github.com/grafana/grafana/releases/tag/v12.2.9
- github.com/grafana/grafana/releases/tag/v12.3.7
- github.com/grafana/grafana/releases/tag/v12.4.4
- github.com/grafana/grafana/releases/tag/v13.0.2
- grafana.com/security/security-advisories/cve-2026-42129
- nvd.nist.gov/vuln/detail/CVE-2026-42129
Code Behaviors & Features
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