{"id":"CVE-2026-107808","published":"2026-10-09T16:17:25.237","lastModified":"2026-10-09T18:17:02.773","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.","cvssScore":8.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-287","CWE-305","CWE-308"],"vendors":[],"products":[],"references":[{"url":"https://github.com/0xJacky/nginx-ui/commit/95cd21b70814e5d9a48a359aa238aeea1ac97429","tags":[]},{"url":"https://github.com/0xJacky/nginx-ui/releases/tag/v2.5.0","tags":[]},{"url":"https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-45gv-9wjv-xh7p","tags":[]},{"url":"https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-45gv-9wjv-xh7p","tags":[]}],"exploitRefs":[{"url":"https://github.com/0xJacky/nginx-ui/commit/95cd21b70814e5d9a48a359aa238aeea1ac97429","tags":[]},{"url":"https://github.com/0xJacky/nginx-ui/releases/tag/v2.5.0","tags":[]},{"url":"https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-45gv-9wjv-xh7p","tags":[]},{"url":"https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-45gv-9wjv-xh7p","tags":[]}],"hasPoc":true,"ai":{"summary":"Nginx UI allows attackers to bypass passkey-based two-factor authentication by logging in with just a password when EnabledPasskey is set but no TOTP secret exists. This creates a false sense of security where accounts appear to have 2FA enabled but can be fully compromised with just the password.","exploitability":"Moderately difficult to exploit as it requires knowledge of a valid username and password, plus the ability to access the login endpoint, but the vulnerability is exploitable without needing the registered passkey.","blast_radius":"Affects all Nginx UI installations between versions 2.0.0 and 2.5.0 where accounts are configured with passkeys but no TOTP backup, potentially allowing full administrative access to affected systems.","remediation":"Upgrade to version 2.5.0 or later to fix the passkey authentication bypass vulnerability.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["auth-bypass","web","authentication","passkey"],"model":"garnet-coder","analyzedAt":"2026-10-17T08:58:27.466Z"}}