CVE-2026-94382

Summary

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.

Affected Software

Weaknesses

• CWE-639: Authorization Bypass Through User-Controlled Key

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://github.com/henrygd/beszel/security/advisories/GHSA-759g-ch5m-2gch

References

• https://github.com/henrygd/beszel/security/advisories/GHSA-759g-ch5m-2gch
• https://github.com/henrygd/beszel/commit/6f92b9396dfbacaf71c20444d175af78e0517409
• https://github.com/henrygd/beszel/blob/v0.18.8/internal/alerts/alerts_api.go#L19-L80
• https://github.com/henrygd/beszel/releases/tag/v0.19.0
• https://github.com/henrygd/beszel
• https://www.vulncheck.com/advisories/beszel-before-0.19.0-insecure-direct-object-reference-via-user-alerts

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