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

Quick assessment

Affected
0xJacky nginx-ui
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Nginx UI 是 Nginx Web 服务器的 Web 用户界面。在版本 2.0.0 至 2.5.0 中，POST /api/login 接口在检查 EnabledOTP 标志时，若 EnabledPasskey 为 true 且未配置 TOTP 密钥，则不会要求提供 WebAuthn 断言（assertion）。因此，对于仅注册了通行密钥（passkey）的账户，在验证密码后仍会发放会话令牌（session），尽管 Enabled2FA 表明该账户已配置了双因素认证。攻击者在获取密码后，即可接管该账户，并在无

CVSS 8.1 · High

Possible ATT&CK Techniques 1 AI

T1078.004 · Cloud Accounts

Affected Version Matrix 1

VendorProduct Version RangeStatus
0xJacky nginx-ui >= 2.0.0, < 2.5.0 affected
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I. Basic Information for CVE-2026-107808

Vulnerability Information
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Vulnerability Title
Nginx UI: Authentication bypass: password login does not enforce a passkey-only second factor (2FA bypass)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
0xJacky nginx-ui >= 2.0.0, < 2.5.0 -

II. Public POCs for CVE-2026-107808

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III. Intelligence Information for CVE-2026-107808

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Patches & Fixes for CVE-2026-107808 (1)

Vendor Advisories for CVE-2026-107808 (1)

Vendor Pages for CVE-2026-107808 (1)

Same Patch Batch · 0xJacky · 2026-10-09 · 10 CVEs total

CVE-2026-107806 9.4 CRITICAL Nginx UI: Authenticated Remote Code Execution via Backup Restore App Config Overwrite
CVE-2026-107807 8.8 HIGH Nginx UI: Node Secret Credential Exposure via URL Query Parameter
CVE-2026-107809 8.8 HIGH Nginx-UI AuthRequired token cookie fallback enables CSRF against management APIs
CVE-2026-107811 8.8 HIGH 0xJacky/nginx-ui /api/nodes Leaks Cluster Node Tokens and Allows Cross-Node Impersonation
CVE-2026-107813 8.8 HIGH Nginx UI: Incomplete fix of CVE-2026-84315 - the api/cluster router was not - wrapped in
CVE-2026-107810 8.1 HIGH Nginx UI: Backup restore follows crafted symlinks into the live Nginx configuration path b
CVE-2026-107805 7.5 HIGH Nginx UI: Unauthenticated signed-request body staging can exhaust temporary storage
CVE-2026-107812 7.5 HIGH Nginx UI: Self-upgrade runs an unsigned binary verified only by a same-origin digest → RCE
CVE-2026-107804 5.3 MEDIUM Nginx UI: Bundled reverse proxy can bypass IP allowlists and enable shared login lockout

IV. Related Vulnerabilities

Same product: nginx-ui
Same vendor: 0xJacky
Same weakness: CWE-287

V. Comments for CVE-2026-107808

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