High severity · published Oct 12, 2026
CVE-2026-84315
Nginx UI OTP secure-session step-up is missing on sensitive mutation routes
8.3
CVSS
0.3%
EPSS
No
On KEV
Description
Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, Nginx UI does not apply RequireSecureSession to multiple authenticated mutation routes even though OTP-enabled users are expected to present a fresh X-Secure-Session-ID for sensitive actions. A stolen authenticated session can therefore create or alter automatic backups, DNS credentials and records, certificates and ACME users, Nginx control settings, and site or stream automation without completing the OTP or passkey step-up. This issue is fixed in version 2.4.1.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% 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-2026-84315
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84315
x_refsource_CONFIRM
https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-5v7c-xpfp-p65m
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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