---
id: CVE-2026-84321
title: Nginx UI is a web user interface for the Nginx web server
summary: >-
  Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1,
  GenerateShortToken creates standalone short-token records without a long Token
  value, but DeleteUserTokens invalidates cached entries only when the long
  Token fie…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-613
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T21:17:22.817'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84321'
references:
  - url: >-
      https://github.com/0xJacky/nginx-ui/commit/23d1934099b05b2a01589b48129dc3d3159d91c2
    label: security-advisories@github.com
  - url: 'https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.1'
    label: security-advisories@github.com
  - url: >-
      https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-wq4w-vwvq-q3x9
    label: security-advisories@github.com
tags:
  - nvd
ingestedAt: '2026-10-12T22:05:40.370Z'
---

## Overview

Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, GenerateShortToken creates standalone short-token records without a long Token value, but DeleteUserTokens invalidates cached entries only when the long Token field is nonempty. A revoked short token can therefore remain in the short_token cache and authenticate again if the associated account is re-enabled before the cache entry expires because GetTokenUserByShortToken reads the surviving entry, restoring access to HTTP or WebSocket routes that accept short-token authentication. This issue is fixed in version 2.4.1.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.