CVE-2026-84312 Nginx UI - Authentication Bypass

Nginx UI < 2.4.1 contains an authentication bypass caused by improper OAuth state validation in GetCasdoorUri and CasdoorCallback, letting unauthenticated attackers mint sessions for arbitrary identities, exploit requires victim browser interaction.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.18% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Published
12 October 2026
Updated
15 October 2026
Weakness
CWE-287

Vendor fix

Update to version 2.4.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs