EUVD-2026-23100Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
5DescriptionCVE.org
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.
AnalysisAI
Path traversal in Grafana Loki 2.3.0 through 3.5.8 allows unauthenticated remote attackers to read arbitrary files on the server via double encoding of the namespace parameter in the Ruler API endpoint /loki/api/v1/rules/{namespace}. This bypasses the fix for CVE-2021-36156, which sanitized the parameter only after a single URL decode. While the CVSS base score is 5.3 (Medium), EPSS exploitation probability is extremely low (0.01%), and no active exploitation or public exploit code is known.
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Same weakness CWE-22 – Path Traversal
View allSame technique Path Traversal
View allVendor StatusVendor
SUSE
Severity: Medium| Product | Status |
|---|---|
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | Fixed |
| SUSE Manager Client Tools 15 | Fixed |
| SUSE Manager Client Tools for SLE 15 | Fixed |
| SUSE Multi-Linux Manager Client Tools for SLE 15 | Fixed |
| openSUSE Leap 15.6 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP4 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | Fixed |
| openSUSE Leap 15.3 | Fixed |
| openSUSE Leap 15.4 | Fixed |
| openSUSE Leap 15.5 | Fixed |
| SUSE Multi Linux Manager Tools SLE-15 | Fixed |
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