CVE-2026-84360 · GHSA-vc32-4gwf-77xp

Nginx UI: OTP secure-session step-up can be bypassed via MCP configuration tools

Risk score: 64/100
CVSS: 8.1 v3.1
Exploit chance (30 days): 0.3%
Published: 12 Oct 2026

Open in the live forecast Today's forecast

What to know

What it is: Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, the HTTP configuration mutation routes require RequireSecureSession, but /mcp and /mcp_message require only ordinary authentication before exposing nginx_config_add and nginx_config_modify. An OTP-enabled user with a normal JWT but no valid X-S…
Affected: github.com/0xJacky/Nginx-UI (go) < 1.9.10-0.20260703131214-23d1934099b0
Fix: Upgrade github.com/0xJacky/Nginx-UI to 1.9.10-0.20260703131214-23d1934099b0 or later.
Exploitation: No known exploitation

Why it is Amber

CVSS 8.1 high
On your watchlist: nginx, Go

Affected packages

Package	Ecosystem	Vulnerable	Fixed in
github.com/0xJacky/Nginx-UI	go	< 1.9.10-0.20260703131214-23d1934099b0	1.9.10-0.20260703131214-23d1934099b0

References

Original description

Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, the HTTP configuration mutation routes require RequireSecureSession, but /mcp and /mcp_message require only ordinary authentication before exposing nginx_config_add and nginx_config_modify. An OTP-enabled user with a normal JWT but no valid X-Secure-Session-ID can therefore create or modify Nginx configuration and trigger reload behavior through MCP, bypassing the intended step-up control. This issue is fixed in version 2.4.1.

Last activity 12 Oct 2026. Patch Forecast updates every hour.