CVE-2026-94382

EUVD-2026-83909
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.2 MEDIUM
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Common Weakness Enumeration
References
https://github.com/henrygd/beszel
https://github.com/henrygd/beszel/blob/v0.18.8/internal/alerts/alerts_api.go#L19-L80
https://github.com/henrygd/beszel/commit/6f92b9396dfbacaf71c20444d175af78e0517409
https://github.com/henrygd/beszel/releases/tag/v0.19.0
https://github.com/henrygd/beszel/security/advisories/GHSA-759g-ch5m-2gch
https://www.vulncheck.com/advisories/beszel-before-0.19.0-insecure-direct-object-reference-via-user-alerts
https://github.com/henrygd/beszel/security/advisories/GHSA-759g-ch5m-2gch