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CVE-2026-21726
Published: Apr 15, 2026
Modified: May 13, 2026
PUBLISHED
CVSS v3.1
5.3
MEDIUM
Description
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.
| Vendor | Product | Versions |
|---|---|---|
Grafana | Loki | affected 2.3.0 - < 3.5.9 |
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
References
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