CVE-2026-107808 Nginx UI: Authentication bypass: password login does not enforce a passkey-only second factor (2FA bypass)
Attackers with valid passwords can bypass passkey-only 2FA in Nginx UI to take over accounts and access administrative functions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-107808?
CVE-2026-107808 is a high-severity authentication bypass vulnerability in 0xJacky nginx-ui, published on 9 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-107808?
3 open source packages ship an affected version, including github.com/0xJacky/Nginx-UI. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/0xJacky/Nginx-UI Go | From 1.9.10-0.20250517140552-daee3ac7ade1 | 1.9.10-0.20260728074558-95cd21b70814 |
github.com/0xJacky/Nginx-UI Go | From 1.9.10-0.20250517140552-daee3ac7ade1 | 1.9.10-0.20260728074558-95cd21b70814 |
github.com/0xJacky/Nginx-UI Go | From 1.9.10-0.20250517140552-daee3ac7ade1 | 1.9.10-0.20260728074558-95cd21b70814 |
Products include Nginxui Nginx Ui.
How do I fix CVE-2026-107808?
Upgrade github.com/0xJacky/Nginx-UI to 1.9.10-0.20260728074558-95cd21b70814 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-107808 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-107808 exists.
Other vulnerabilities in 0xJacky nginx-ui
- CVE-2026-33032 Nginx UI: Unauthenticated MCP Endpoint Allows Remote Nginx Takeover
- CVE-2026-27944 Nginx UI: Unauthenticated Backup Download with Encryption Key Disclosure
- CVE-2024-23827 Nginx-UI arbitrary file write through the Import Certificate feature
- CVE-2026-107806 Nginx UI: Authenticated Remote Code Execution via Backup Restore App Config Overwrite
- CVE-2026-33026 nginx-ui Backup Restore Allows Tampering with Encrypted Backups
Sources
Also known as GHSA-45gv-9wjv-xh7p, GO-2026-6704.