Detections
Analytics

Echo: github.com/grafana/loki/v3: security update to 3.6.4

medium Tenable Self-Hosted Container Security Plugin ID 463946

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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.
 (CVE-2026-21726)

Solution

Update the github.com/grafana/loki/v3 library and its related packages to version 3.6.4 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-21726

Plugin Details

Severity: Medium

ID: 463946

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2026-21726

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 4/15/2026

Reference Information

CVE: CVE-2026-21726