What is CVE-2026-107808?

CVE-2026-107808 is a high-severity vulnerability in 0xjacky Nginx-Ui, classified under Improper Authentication. CVSS score: 8.1/10. Published 2026-10-09.

How severe is CVE-2026-107808?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in 0xjacky Nginx-Ui

CVE-2026-107808

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.

Vulnerability class: Broken Authentication

Published 2026-10-09 · last modified 2026-10-09.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

0xjacky Nginx-Ui — versions >= 2.0.0, < 2.5.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-107808?: CVE-2026-107808 is a high-severity vulnerability in 0xjacky Nginx-Ui, classified under Improper Authentication. CVSS score: 8.1/10. Published 2026-10-09.
How severe is CVE-2026-107808?: High severity. CVSS v3 base score is 8.1 out of 10.