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CVE-2026-21726

5.3 medium SSVC exploitation: none Analyzed
NVD · CVE.org

The CVE-2021-36156 fix validates the namespace parameter for path traversal sequences after a single URL decode, by double encoding, an attacker can read files at the Ruler API endpoint /loki/api/v1/rules/{namespace} Thanks to Prasanth Sundararajan for reporting this vulnerability.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 5.3 · grafanaNVD modified 2026-10-26 21:10

Affected (CPE criteria) 1

  • cpe:2.3:a:grafana:loki:*:*:*:*:*:*:*:*

References 1