What is CVE-2026-33031?

CVE-2026-33031 is a high-severity vulnerability in 0xjacky Nginx-ui, classified under Improper Access Control. CVSS score: 8.1/10. Published 2026-04-20.

How severe is CVE-2026-33031?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in 0xjacky Nginx-ui

CVE-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 tokens for up to the token lifetime. In practice, disabling a compromised account…

EPSS: 0.003 (19.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

0xjacky Nginx-ui — versions < 2.3.4
Nginxui Nginx_ui

Weakness classification (CWE)

CWE-284 — Improper Access Control
CWE-863 — Incorrect Authorization

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-33031?: CVE-2026-33031 is a high-severity vulnerability in 0xjacky Nginx-ui, classified under Improper Access Control. CVSS score: 8.1/10. Published 2026-04-20.
How severe is CVE-2026-33031?: High severity. CVSS v3 base score is 8.1 out of 10.