Vulnerability · Published Apr 20, 2026 · Assigned by GitHub_M
CVE-2026-33031Nginx-UI: Disabled users retain full API access through previously issued bearer tokens
High 8.6
In plain English
A high-severity improper access control in nginx-ui from 0xJacky. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/0xJacky/Nginx-UI | 1.9.10-0.20260314152518-7b66578adb47 | GHSA-x234-x5vq-cc2v |
| Go | github.com/0xJacky/Nginx-UI | 1.9.10-0.20260314152518-7b66578adb47 | GO-2026-5733 |
Affected products (as reported)
Weakness: CWE-284, CWE-863 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-x234-x5vq-cc2v x_refsource_CONFIRM