CVE-2026-33031
Nginx-UI: Disabled users retain full API access through previously issued bearer tokens
Description
Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, a user who was disabled by an administrator can use previously issued API tokens for up to the token lifetime. In practice, disabling a compromised account does not actually terminate that user’s access, so an attacker who already stole a JWT can continue reading and modifying protected resources after the account is marked disabled. Since tokens can be used to create new accounts, it is possible the disabled user to maintain the privilege. Version 2.3.4 patches the issue.
INFO
Published Date :
April 20, 2026, 9:16 p.m.
Last Modified :
Oct. 26, 2026, 10:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Nginx UI to version 2.3.4 or later.
- Re-evaluate and revoke compromised API tokens.
- Implement stricter token lifecycle management.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-33031.
| URL | Resource |
|---|---|
| https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-x234-x5vq-cc2v | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-33031 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-33031
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-33031 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-33031 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 26, 2026
Action Type Old Value New Value Added Translation Title: nginx-ui de 0xJacky, Description: Nginx UI es una interfaz de usuario web para el servidor web Nginx. Antes de la versión 2.3.4, un usuario que fue deshabilitado por un administrador puede usar tokens de API emitidos previamente por hasta la vida útil del token. En la práctica, deshabilitar una cuenta comprometida no termina realmente el acceso de ese usuario, por lo que un atacante que ya robó un JWT puede continuar leyendo y modificando recursos protegidos después de que la cuenta sea marcada como deshabilitada. Dado que los tokens pueden usarse para crear nuevas cuentas, es posible que el usuario deshabilitado mantenga el privilegio. La versión 2.3.4 corrige el problema. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': '0xJacky', 'product': 'nginx-ui', 'versions': [{'status': 'affected', 'version': '< 2.3.4'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-33031', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-04-21T13:35:06.066773Z'} -
Initial Analysis by [email protected]
Apr. 22, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Added CPE Configuration OR *cpe:2.3:a:nginxui:nginx_ui:*:*:*:*:*:*:*:* versions up to (excluding) 2.3.4 Added Reference Type GitHub, Inc.: https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-x234-x5vq-cc2v Types: Exploit, Vendor Advisory -
New CVE Received by [email protected]
Apr. 20, 2026
Action Type Old Value New Value Added Description Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, a user who was disabled by an administrator can use previously issued API tokens for up to the token lifetime. In practice, disabling a compromised account does not actually terminate that user’s access, so an attacker who already stole a JWT can continue reading and modifying protected resources after the account is marked disabled. Since tokens can be used to create new accounts, it is possible the disabled user to maintain the privilege. Version 2.3.4 patches the issue. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-284 Added CWE CWE-863 Added Reference https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-x234-x5vq-cc2v