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CVE PROGRAM SOURCE RECORD9.1 Critical

CVE-2026-55196

Hermes WebUI < 0.51.409 - Unauthenticated Passkey Registration via Authentication Bypass

Description

Hermes WebUI before 0.51.409 contains an authentication bypass vulnerability in passkey registration endpoints that allows unauthenticated remote attackers to register arbitrary passkeys. When HERMES_WEBUI_PASSKEY=1 is enabled with no existing credentials, POST /api/auth/passkey/register/options and POST /api/auth/passkey/register endpoints are accessible without authentication, allowing attackers to claim the first passkey and gain permanent administrative control.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

hermes-webui hermes-webui

Default version status: unaffected

  • 0 to < 0.51.409affected
  • 0.51.409unaffected
pkg:github/nesquena/hermes-webui

References