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SCA: security update for github.com/henrygd/beszel (GHSA-phwh-4f42-gwf3)

medium Tenable Self-Hosted Container Security Plugin ID 438135

Description

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

 - Beszel is a server monitoring platform. Prior to version 0.18.2, the hub's authenticated API endpoints GET
 /api/beszel/containers/logs and GET /api/beszel/containers/info pass the user-supplied "container" query
 parameter to the agent without validation. The agent constructs Docker Engine API URLs using fmt.Sprintf
 with the raw value instead of url.PathEscape(). Since Go's http.Client does not sanitize `../` sequences
 from URL paths sent over unix sockets, an authenticated user (including readonly role) can traverse to
 arbitrary Docker API endpoints on agent hosts, exposing sensitive infrastructure details. Version 0.18.4
 fixes the issue. (CVE-2026-27734)

See Also

https://github.com/advisories/GHSA-phwh-4f42-gwf3

Plugin Details

Severity: Medium

ID: 438135

Version: Revision 1.5

Type: Local

Family: SCA Checks

Published: 3/4/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.73

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-27734

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/27/2026

Vulnerability Publication Date: 2/27/2026

Reference Information

CVE: CVE-2026-27734

cwe: CWE-22