Medium severity5.3NVD Advisory· Published Apr 15, 2026· Updated Apr 20, 2026
CVE-2026-21726
CVE-2026-21726
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.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/grafana/loki/v3Go | < 3.6.4 | 3.6.4 |
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
3- github.com/advisories/GHSA-497x-rrr9-68jpghsaADVISORY
- grafana.com/security/security-advisories/cve-2026-21726nvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-21726ghsaADVISORY
News mentions
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