CVE-2026-107808

Nginx UI: Authentication bypass: password login does not enforce a passkey-only second factor (2FA bypass)

Published Oct 9, 2026 CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
Description
Nginx UI is a web user interface for the Nginx web server. From 2.0.0 until 2.5.0, POST /api/login checks EnabledOTP but does not require a WebAuthn assertion when EnabledPasskey is true and no TOTP secret is configured. A passkey-only account is therefore issued a session after password verification, despite Enabled2FA reporting that the account has a second factor. An attacker who obtains the password can take over the account and reach administrative functionality without the registered passkey. This issue is fixed in version 2.5.0.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-45gv-9wjv-xh7p Nginx UI: Authentication bypass: password login does not enforce a passkey-only second factor (2FA bypass)
History
Type Values Removed Values Added
First Time appeared Nginxui
Nginxui nginx Ui
CPEs cpe:2.3:a:nginxui:nginx_ui:*:*:*:*:*:*:*:*
Vendors & Products Nginxui
Nginxui nginx Ui
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared 0xjacky
0xjacky nginx-ui
Vendors & Products 0xjacky
0xjacky nginx-ui
Type Values Removed Values Added
Description Nginx UI is a web user interface for the Nginx web server. From 2.0.0 until 2.5.0, POST /api/login checks EnabledOTP but does not require a WebAuthn assertion when EnabledPasskey is true and no TOTP secret is configured. A passkey-only account is therefore issued a session after password verification, despite Enabled2FA reporting that the account has a second factor. An attacker who obtains the password can take over the account and reach administrative functionality without the registered passkey. This issue is fixed in version 2.5.0.
Title Nginx UI: Authentication bypass: password login does not enforce a passkey-only second factor (2FA bypass)
Weaknesses CWE-287
CWE-305
CWE-308
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 9, 2026, 5:19 PM
Reserved
Oct 8, 2026, 9:23 PM
Status
Analyzed
Published
Oct 9, 2026, 4:17 PM
Modified
Oct 20, 2026, 3:24 PM