Auth bypass in Henrygd Beszel
CVE-2026-94382
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (23.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/henrygd/beszel/security/advisories/GHSA-759g-ch5m-2gch (vendor-advisory)
- github.com/henrygd/beszel/commit/6f92b9396dfbacaf71c20444d175af78e0517409 (patch)
- github.com/henrygd/beszel/blob/v0.18.8/internal/alerts/alerts_api.go (technical-description)
- github.com/henrygd/beszel/releases/tag/v0.19.0 (release-notes)
- github.com/henrygd/beszel (product)
- www.vulncheck.com/advisories/beszel-before-0.19.0-insecure-direct-object-refere… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-94382?
- CVE-2026-94382 is a medium-severity vulnerability in Henrygd Beszel, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.2/10. Published 2026-09-21.
- How severe is CVE-2026-94382?
- Medium severity. CVSS v3 base score is 4.2 out of 10.