What’s Vulnerable › Vulnerabilities

CVE-2026-107808: Nginx UI: Authentication bypass: password login does not enforce a passkey-only second factor (2FA bypass)

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-09 · updated 2026-10-20
• Weakness: CWE-287

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.

Affected products

• 0xJacky nginx-ui: from 2.0.0 before 2.5.0 — fixed in 2.5.0

How to fix

Upgrade to a fixed version: 0xJacky nginx-ui 2.5.0. Check the vendor advisory for mitigations.

References

• https://github.com/0xJacky/nginx-ui/commit/95cd21b70814e5d9a48a359aa238aeea1ac97429
• https://github.com/0xJacky/nginx-ui/releases/tag/v2.5.0
• https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-45gv-9wjv-xh7p
• https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-45gv-9wjv-xh7p

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