CVE-2026-21726
Loki: Loki: Information disclosure via path traversal vulnerability
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 16, 2026
Updated · July 3, 2026
Description
A flaw was found in Loki. A remote attacker can exploit a path traversal vulnerability by using double encoding on the namespace parameter after a single URL decode. This allows the attacker to read arbitrary files at the Ruler API endpoint, leading to information disclosure.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE-76 · Improper Neutralization of Equivalent Special Elements