CVE-2026-107804

MEDIUM 5.3

Nginx UI: Bundled reverse proxy can bypass IP allowlists and enable shared login lockout

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

Nginx UI is a web user interface for the Nginx web server. From 2.2.0 until 2.6.0, the bundled reverse proxy does not preserve the external client identity used by Gin because the backend has no trusted proxy configuration. Management requests can be attributed to loopback and pass the IP allowlist loopback exception, although valid credentials are still required. Failed logins from different external clients are also attributed to the same loopback address, allowing an unauthenticated attacker to trigger a shared temporary login ban for password or OTP authentication without invalidating existing sessions. This issue is fixed in version 2.6.0.

CWE	CWE-346
Vendor	0xjacky
Product	nginx-ui
Published	Oct 9, 2026
Last Updated	Oct 9, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

0xJacky / nginx-ui

>= 2.2.0, < 2.6.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-9h23-53f4-q947 github.com: https://github.com/0xJacky/nginx-ui/commit/e30e331303fc21cf077a2bea724bd79e66892eaf github.com: https://github.com/0xJacky/nginx-ui/releases/tag/v2.6.0