EUVD-2026-97907

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

GHSA-VC32-4GWF-77XP Nginx UI: OTP secure-session step-up can be bypassed via MCP configuration tools

Summary An OTP-enabled authenticated user who cannot use the HTTP configuration mutation endpoints without a valid secure session can still mutate Nginx configuration through /mcp and /mcpmessage using only ordinary authentication. Details The HTTP configuration mutation surface is explicitly...

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

Summary An OTP-enabled authenticated user who cannot use the HTTP configuration mutation endpoints without a valid secure session can still mutate Nginx configuration through /mcp and /mcpmessage using only ordinary authentication. Details The HTTP configuration mutation surface is explicitly...

GHSA-9JWW-CXG5-RJ9M Nginx UI: MCP `nginx_config_add` Bypasses Directive Validation — Authenticated RCE

Summary The MCP tool nginxconfigadd writes nginx configuration files to disk and triggers an nginx reload without calling config.ValidateConfigFile. The identical flow in the REST API POST /api/configs does call that function and correctly rejects dangerous directives. An authenticated attacker c...

EUVD-2026-97908

Nginx UI: MCP nginxconfigadd Bypasses Directive Validation — Authenticated RCE...

Nginx UI: MCP `nginx_config_add` Bypasses Directive Validation — Authenticated RCE

Summary The MCP tool nginxconfigadd writes nginx configuration files to disk and triggers an nginx reload without calling config.ValidateConfigFile. The identical flow in the REST API POST /api/configs does call that function and correctly rejects dangerous directives. An authenticated attacker c...

Nginx UI: MCP nginx_config_add skips config directive validation → authenticated nginx directive injection (RCE on the official image)

Summary internal/config/validation.go ValidateConfigFile is a security control that blocks dangerous nginx directives — js, perl, loadmodule of the njs/perl modules, and user root. It is enforced on three of the four config-write paths: api/config/add.go, api/config/modify.go, and...

GHSA-76PM-MQ2Q-9GCR Nginx UI: MCP nginx_config_add skips config directive validation → authenticated nginx directive injection (RCE on the official image)

Summary internal/config/validation.go ValidateConfigFile is a security control that blocks dangerous nginx directives — js, perl, loadmodule of the njs/perl modules, and user root. It is enforced on three of the four config-write paths: api/config/add.go, api/config/modify.go, and...

Nginx UI: MCP configuration tools bypass restricted directive validation and allow secondary authenticated users to execute NJS in Nginx worker context

Summary The regular HTTP configuration API rejects restricted Nginx directives such as loadmodule, jsimport, and jscontent. However, the MCP configuration interface allows a secondary authenticated user to write and apply equivalent restricted configuration content. In the lab, this allowed the...

GHSA-5R62-GJ48-897X Nginx UI: MCP configuration tools bypass restricted directive validation and allow secondary authenticated users to execute NJS in Nginx worker context

Summary The regular HTTP configuration API rejects restricted Nginx directives such as loadmodule, jsimport, and jscontent. However, the MCP configuration interface allows a secondary authenticated user to write and apply equivalent restricted configuration content. In the lab, this allowed the...

CVE-2026-84317

Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, internal/config/validation.go ValidateConfigFile is a security control that blocks dangerous nginx directives — js, perl, loadmodule of the njs/perl modules, and user root. It is enforced on three of the four config-write...

CVE-2026-84318

Nginx UI is a web user interface for the Nginx web server. From 2.0.0-rc.6 until 2.4.1, the MCP tool nginxconfigadd writes nginx configuration files to disk and triggers an nginx reload without calling config.ValidateConfigFile. The identical flow in the REST API POST /api/configs does call that...

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 RequireSecureSession, but /mcp and /mcpmessage require only ordinary authentication before exposing nginxconfigadd and nginxconfigmodify. An OTP-enabled user with a normal JWT...

CVE-2026-84360

The Nginx UI web interface for the Nginx web server is vulnerable to an authentication bypass in versions prior to 2.4.1 . The root cause is that while HTTP configuration mutation routes require RequireSecureSession , the /mcp and /mcp_message endpoints only require ordinary authentication. This ...

CVE-2026-84360 Nginx UI: OTP secure-session step-up can be bypassed via MCP configuration tools

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 /mcpmessage require only ordinary authentication before exposing nginxconfigadd and nginxconfigmodify. An OTP-enabled user with a normal JWT...

CVE-2026-84360 Nginx UI: OTP secure-session step-up can be bypassed via MCP configuration tools

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 /mcpmessage require only ordinary authentication before exposing nginxconfigadd and nginxconfigmodify. An OTP-enabled user with a normal JWT...

CVE-2026-84317

Prior to version 2.4.1 , Nginx UI (a web user interface for the Nginx web server) contains a vulnerability where the mcp/config/config_add.go path (MCP tool nginx_config_add) fails to call the internal/config/validation.go security control. While other config-write paths block dangerous directive...

CVE-2026-84317 Nginx UI: MCP nginx_config_add skips config directive validation → authenticated nginx directive injection (RCE on the official image)

Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, internal/config/validation.go ValidateConfigFile is a security control that blocks dangerous nginx directives — js, perl, loadmodule of the njs/perl modules, and user root. It is enforced on three of the four config-write...

CVE-2026-84318

Nginx UI versions from 2.0.0-rc.6 until 2.4.1 are vulnerable to an authenticated security bypass. The MCP tool nginx_config_add writes configuration files to disk and triggers a reload without invoking config.ValidateConfigFile. This differs from the REST API, which correctly rejects dangerous di...

CVE-2026-84318 Nginx UI: MCP `nginx_config_add` Bypasses Directive Validation — Authenticated RCE

Nginx UI is a web user interface for the Nginx web server. From 2.0.0-rc.6 until 2.4.1, the MCP tool nginxconfigadd writes nginx configuration files to disk and triggers an nginx reload without calling config.ValidateConfigFile. The identical flow in the REST API POST /api/configs does call that...