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HIGH · 7.7

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 Description

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.

CVSS Score

7.7

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE

Affected Products

VendorProductVersions
GrafanaLoki Datasource-

Related Weaknesses (CWE)

CWE-22

References

FAQ

What is CVE-2026-42129?

CVE-2026-42129 is a vulnerability with a CVSS score of 7.7 (HIGH). 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.

How severe is CVE-2026-42129?

CVE-2026-42129 has been rated HIGH with a CVSS base score of 7.7/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-42129?

Check the references section above for vendor advisories and patch information. Affected products include: Grafana Loki Datasource.