CVE-2026-94382

Medium

Description

Beszel before 0.19.0 contains an insecure direct object reference vulnerability in the POST and DELETE /api/beszel/user-alerts handlers that allows any authenticated user to create or delete alerts on systems they cannot access. Attackers can supply arbitrary system IDs in the request body to register alert rules and receive notifications disclosing target system names and metrics.

SeverityMedium

CVSS4.2

Exploit probability—

ProductHenrygd Beszel

PublishedSep 21, 2026

First seenSep 21, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key

How to fix

Update

henrygd beszel0.19.0 or later

Patches

github.com/henrygd/beszel/commit/6f92b9396dfbacaf71c20444d175af78e0517409

Vendor advisories

Affected products

Product	Affected versions	Fixed in
henrygd beszel	v < 0.19.0	0.19.0

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