ByteOS Network

NVD Vulnerability Details :

CVE-2026-27734

Received

Source-security-advisories@github.com

Published At-27 Feb, 2026 | 20:21

Updated At-27 Feb, 2026 | 20:21

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.

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Secondary	3.1	6.5	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Type: Secondary

Version: 3.1

Base score: 6.5

Base severity: MEDIUM

Vector:

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weaknesses

CWE ID	Type	Source
CWE-22	Primary	security-advisories@github.com

CWE ID: CWE-22

Type: Primary

Source: security-advisories@github.com

References

Hyperlink	Source	Resource
https://github.com/henrygd/beszel/releases/tag/v0.18.4	security-advisories@github.com	N/A
https://github.com/henrygd/beszel/security/advisories/GHSA-phwh-4f42-gwf3	security-advisories@github.com	N/A

Hyperlink: https://github.com/henrygd/beszel/releases/tag/v0.18.4

Source: security-advisories@github.com

Resource: N/A

Hyperlink: https://github.com/henrygd/beszel/security/advisories/GHSA-phwh-4f42-gwf3

Source: security-advisories@github.com

Resource: N/A

CISA Catalog

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Change History