Medium 5.3Published Oct 9, 2026

CVE-2026-107804Nginx UI: Bundled reverse proxy can bypass IP allowlists and enable shared login lockout

Updated under an hour ago (2026-10-19 09:20 UTC)

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It affects 0xJacky nginx-ui. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for 0xJacky nginx-ui

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness (CWE): CWE-346
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

0xJacky nginx-ui 0xjacky:nginx_ui (from the name)	from 2.2.0, < 2.6.0	CNA record

References

https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-9h23-53f4-q947x-refsource-confirm
https://github.com/0xJacky/nginx-ui/commit/e30e331303fc21cf077a2bea724bd79e66892eafx-refsource-misc
https://github.com/0xJacky/nginx-ui/releases/tag/v2.6.0x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.