CVE-2021-36156: Grafana Loki

Medium severity, CVSS 5.3. EPSS: 1.5% chance of exploitation in the next 30 days.

An issue was discovered in Grafana Loki through 2.2.1. The header value X-Scope-OrgID is used to construct file paths for rules files, and if crafted to conduct directory traversal such as ae ../../sensitive/path/in/deployment pathname, then Loki will attempt to parse a rules file at that location and include some of the contents in the error message.

Affected products

• Grafana Loki: up to and including 2.2.1

Published 2021-08-03. Last modified 2026-06-17.