CVE-2026-33031
published 2026-04-20CVE-2026-33031: 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…
PriorityP354high8.1CVSS 3.1
AVNACLPRLUINSUCHIHAN
EPSS
0.27%
19.1th percentile
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
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| 0xjacky | nginx-ui | < 2.3.4 | 2.3.4 |
| github.com | 0xjacky_nginx-ui | >= 0 < 1.9.10-0.20260314152518-7b66578adb47 | 1.9.10-0.20260314152518-7b66578adb47 |
| nginxui | nginx_ui | < 2.3.4 | 2.3.4 |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
nvdv4.08.6HIGHCVSS:4.0/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
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VulDB
0xJacky Nginx-UI up to 2.3.3 API Token access control (GHSA-x234-x5vq-cc2v / WID-SEC-2026-1188)
vuldb·2026-04-22·CVSS 8.6
CVE-2026-33031 [HIGH] 0xJacky Nginx-UI up to 2.3.3 API Token access control (GHSA-x234-x5vq-cc2v / WID-SEC-2026-1188)
A vulnerability was found in 0xJacky Nginx-UI up to 2.3.3. It has been classified as critical. Impacted is an unknown function of the component API Token Handler. This manipulation causes improper access controls.
This vulnerability appears as CVE-2026-33031. The attack may be initiated remotely. There is no available exploit.
Upgrading the affected component is recommended.
GHSA
Nginx-UI: Disabled users retain full API access through previously issued bearer tokens
ghsa·2026-04-21
CVE-2026-33031 [HIGH] CWE-284 Nginx-UI: Disabled users retain full API access through previously issued bearer tokens
Nginx-UI: Disabled users retain full API access through previously issued bearer tokens
### Summary
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.
### Details
The application exposes an account-level disable control through the users management API. Login process correctly enforces that control:
https://github.com/0xJacky/nginx-ui/blob/6ec542fd97abf2c5950f374f78a32938ad0030e6/internal/user/logi
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-04-20
Published