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Advisories

Hermes WebUI < 0.51.409 - Unauthenticated Passkey Registration via Authentication Bypass

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severity
critical
date
Affecting

  • Hermes WebUI < 0.51.409

CWE
  • CWE-306 Missing Authentication for Critical Function
CVSS
9.1
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
Chia Min Jun Lennon
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.

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