medium5.3
CVE-2026-21726
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…
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/grafana/loki/v3 | < 3.6.4 | 3.6.4 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Grafana | Loki | before 3.6.4 |