High severity · published Oct 12, 2026
CVE-2026-84312
Nginx UI: Casdoor SSO callback uses a constant `state` parameter (login CSRF)
7.1
CVSS
0.2%
EPSS
No
On KEV
Description
Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, GetCasdoorUri uses the configured Casdoor application name as a constant OAuth state value and CasdoorCallback does not compare the submitted state with a value bound to the initiating browser session. An unauthenticated attacker can cause a victim's browser to complete an attacker-controlled Casdoor authorization flow, and the callback can mint a Nginx UI session for the identity returned by that authorization code. This issue is fixed in version 2.4.1.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NG
nginx-ui · 0xJacky
< 2.4.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84312
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84312
x_refsource_CONFIRM
https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-44xr-mrhh-qm78
x_refsource_MISC
https://github.com/0xJacky/nginx-ui/commit/23d1934099b05b2a01589b48129dc3d3159d91c2
x_refsource_MISC
https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.1
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