Path Traversal in Grafana Oss
CVE-2026-42129
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (36.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Grafana Oss — versions 13.0.0, 12.4.0, 12.3.0
- Grafana Loki Datasource
Weakness classification (CWE)
References
- grafana.com/security/security-advisories/cve-2026-42129 (vendor-advisory, Broken Link)
Frequently asked questions
- What is CVE-2026-42129?
- CVE-2026-42129 is a high-severity vulnerability in Grafana Oss, classified under Path Traversal. CVSS score: 7.7/10. Published 2026-06-22.
- How severe is CVE-2026-42129?
- High severity. CVSS v3 base score is 7.7 out of 10.