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    CVE-2026-55196

    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.

    Published:Jun 17, 2026
    Last Modified:Jul 14, 2026
    EPS:Jun 17, 2026
    EPSS Score:0.00579
    CVSS Score:9.1

    Affected Products

    Vendor
    Get-hermes
    Product
    Hermes Web Ui
    Vendor
    Hermes-webui
    Product
    Hermes-webui

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-55205 (CVSS 6.9) — Hermes WebUI before 0.51.468 contains a resource exhaustion vulnerability in the unauthenticated POST /api/onb…
    CVE-2026-55198 (CVSS 7.1) — Hermes WebUI before 0.51.443 contains an authorization bypass vulnerability in the session export endpoint tha…
    CVE-2026-55197 (CVSS 7.1) — Hermes WebUI before 0.51.443 contains a broken access control vulnerability in the /api/session endpoint that …
    CVE-2026-53871 (CVSS 8.6) — Hermes WebUI before 0.51.368 contains an authorization bypass vulnerability in the get_profile_cookie() functi…
    CVE-2026-49973 (CVSS 9.2) — Hermes WebUI before version 0.51.358 contains an improper access control vulnerability that allows unauthentic…
    CVE-2026-49959 (CVSS 8.7) — Hermes WebUI before version 0.51.311 contains a remote code execution vulnerability that allows authenticated …
    CVE-2026-49958 (CVSS 4.3) — Hermes WebUI before version 0.51.303 contains a time-of-check time-of-use (TOCTOU) race condition vulnerabilit…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High