CVE WatchOct 13, 2026

CVE-2026-84360

Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, the HTTP configuration mutation routes require RequireSecureSessi

CVSS

8.1

High

EPSS

0.3%

p27

KEV

—

Exploit Today

0-100

Published: Oct 12, 2026 · Last modified: Oct 13, 2026 · CWE-288

EPSS · 30d

0.3%EPSS · 30 days0.3%

2026-10-132026-10-23

Technical 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.

Official references

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