Grafana Loki Datasource Plugin Path Traversal (callResource)
CVE-2026-42129 Published on June 22, 2026
Path traversal in the Loki data source plugin
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.
Weakness Type
What is a Directory traversal Vulnerability?
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
CVE-2026-42129 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2026-42129
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Affected Versions
Grafana OSS:- Version 11.6.0, <= 11.6.14 is affected.
- Version 12.2.0, <= 12.2.8 is affected.
- Version 12.3.0, <= 12.3.6 is affected.
- Version 12.4.0, <= 12.4.3 is affected.
- Version 13.0.0, <= 13.0.1 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.