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CVE-2026-55196

CRITICAL
9.1
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-55196
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-06-16 15:53 UTC
Published
2026-06-17 17:58 UTC
Last updated
2026-06-17 17:58 UTC
Primary CWE
CWE-306
Missing Authentication for Critical Function
Vendor / Product
hermes-webui / hermes-webui
Sources
cve.org  ·  NVD

Severity & Metrics

9.1 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected products (1)
VendorProductPlatformVersions
hermes-webui hermes-webui — 0 < 0.51.409, 0.51.409
Weakness (CWE)
CWESourceDescription
CWE-306 cna Missing Authentication for Critical Function
CVSS scores (2)
ScoreSeverityVersionSourceVector
9.1 CRITICAL 4.0 cna 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
9.1 CRITICAL 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
References (5)
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