VDB
CVE-2026-21726
CVE-2026-21726
PUBLISHED
CVSS 5.300000190734863 MEDIUM
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.
EPSS 0.02% · 4.2th percentile
Risk Scores
CVSS v3.1
5.300000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS Score
0.02%
4.2th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Grafana | Loki | 2.3.0 |
Timeline
- Apr 15, 2026 CVE Published
- Apr 16, 2026 Security Advisory
- Apr 20, 2026 CVE Updated
- May 18, 2026 EPSS Score
- May 19, 2026 EPSS Score
- May 20, 2026 EPSS Score
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 23, 2026 EPSS Score
- May 24, 2026 EPSS Score
- May 25, 2026 EPSS Score
- May 26, 2026 EPSS Score