PT-2026-31706 · Beszel · Beszel

Published 2026-04-09 · Updated 2026-04-28 · CVE-2026-40077

Positive Technologies (AI Summary)

CVSS v3.1

3.5

Low

Base vector

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

Name of the Vulnerable Software and Affected Versions Beszel versions prior to 0.18.7

Description Beszel is a server monitoring platform. Some API endpoints in the Beszel hub accept a user-supplied system ID without verifying user access permissions. This allows authenticated users to access routes for any system if they know the system's ID. System IDs are 15-character alphanumeric strings, and while not generally exposed, can potentially be enumerated by authenticated users through the web API. Accessing container endpoints also requires enumerating 12-digit hexadecimal container IDs.

Recommendations Update to version 0.18.7 or later.

Fix

Incomplete List of Disallowed Inputs

Weakness Enumeration

CWE-184

Related Identifiers

CVE-2026-40077

GHSA-5F5R-95PG-XRPM

Affected Products

Beszel

References · 7

• https://github.com/henrygd/beszel/security/advisories/GHSA-5f5r-95pg-xrpm · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-5f5r-95pg-xrpm · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-40077 · Security Note
• https://github.com/henrygd/beszel · Note
• https://github.com/henrygd/beszel/releases/tag/v0.18.7 · Note
• https://twitter.com/_cvereports/status/2049068835731378274 · Twitter Post
• https://twitter.com/CVEnew/status/2042340059672682855 · Twitter Post