CVE-2026-21726EPSS p35.0%
CVE-2026-21726CVE-2026-21726
grafana / loki
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.
Scoring
| CVSS | 5.3 () |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| EPSS | 0.41% probability of exploitation · percentile 35.0% · 2026-10-27T12:03:15Z |
| Last modified | 2026-10-26 |