Description
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.
Published: 2026-10-09
Score: 5.3 Medium
EPSS: n/a
KEV: No
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History

Fri, 09 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 09 Oct 2026 15:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Nginx UI: Bundled reverse proxy can bypass IP allowlists and enable shared login lockout
Weaknesses CWE-346
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}


Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-09T15:09:10.128Z

Reserved: 2026-10-08T21:23:59.820Z

Link: CVE-2026-107804

cve-icon Vulnrichment

Updated: 2026-10-09T15:08:34.739Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-09T15:17:09.750

Modified: 2026-10-09T16:38:57.820

Link: CVE-2026-107804

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-09T16:30:09Z

Weaknesses