What is CVE-2026-42129?

CVE-2026-42129 is a high-severity vulnerability in Grafana Oss. 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.

Vulnerability in Grafana Oss

CVE-2026-42129

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…

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.

Affected products

Grafana Oss

References

security@grafana.com (vendor-advisory)

Frequently asked questions

What is CVE-2026-42129?: CVE-2026-42129 is a high-severity vulnerability in Grafana Oss. 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.