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CVE-2026-33032

CVE-2026-33032 / MCPwn 针对 nginx-ui MCP 认证绕过漏洞（公开名称为 MCPwn ）的非破坏性检测工具。通过两次 HTTP 请求即可在未认证的情况下完全接管任何运行受影响版本的 nginx-ui 实例。 目录 1. 快速概览 2. 漏洞概述 3. 技术深入分析 4. 检测策略 5. 安装 6. 使用方法 7. 输出示例 8. 与 CVE-2026-27944 联动 9. 修复建议 10. 负责任使用 11. 参考资料 12. 许可证 快速概览 漏洞概述 nginx-ui 暴露了一个模型上下文协议（MCP）接口，允许经过认证的操作员通过 JSON-RPC...

cve-2026-33032-scanner

CVE-2026-33032 扫描器 用于 Nginx-UI MCP 端点认证绕过的非破坏性漏洞扫描器 漏洞概述 CVE-2026-33032 是 nginx-ui 的模型上下文协议（MCP）集成中的一个认证绕过漏洞。/mcpmessage 端点在提供所有 MCP 工具访问权限的同时缺少认证中间件，允许远程攻击者： 读取 nginx 配置和状态 创建/修改/删除 nginx 配置文件 重启或重新加载 nginx 服务 窃取敏感配置数据 注入恶意配置以进行流量拦截 根本原因 1. 认证不对称 ：/mcp 端点需要认证，但 /mcpmessage 不需要： root@kitploit:...

CVE-2026-59822

A flaw was found in LiteLLM, a proxy server designed for Large Language Model LLM APIs. An unauthenticated attacker could exploit a vulnerability in the MCP Streamable HTTP endpoint. By using a fabricated Authorization header, the attacker could bypass the standard key validation, gaining...

siyuan-mcp-admin-takeover-cve-2026-66012-missing-authorization

CVE-2026-66012 — SiYuan MCP 未授权管理员接管 CVE-2026-66012 （CVSS 10.0 严重）的概念验证，这是 SiYuan 的 MCP（模型上下文协议）端点中存在的一个缺失授权漏洞，当发布服务器以匿名模式启用时，未经身份验证的攻击者可利用该漏洞实现管理员接管和远程代码执行。 漏洞摘要...

CVE-2026-45019

Chainlit is a Python framework for building production-ready conversational AI applications. From 2.4.0rc0 until 2.12.0, Chainlit deployments with features.mcp.enabled set to true in .chainlit/config.toml expose the POST /mcp endpoint without requiring authentication. For sse and streamable-http...

CVE-2026-45019

Chainlit (a Python framework for building conversational AI applications) is affected by an SSRF vulnerability in its MCP integration. From version 2.4.0rc0 to 2.12.0 , deployments with features.mcp.enabled = true expose the POST /mcp endpoint without authentication. For SSE and streamable-http t...

EUVD-2026-42717

@arikusi/deepseek-mcp-server: Missing Authentication on Self-Hosted HTTP MCP Endpoint...

PT-2026-66665

An allocation of resources without limits vulnerability in the HTTP handler component of Google mcp-toolbox versions up to and including 1.4.0 allows an unauthenticated attacker to cause a denial of service DoS. The /mcp endpoint handler reads incoming payloads directly into system memory using a...

CVE-2026-66012

SiYuan before v3.7.2 contains a missing authorization vulnerability in the POST /mcp kernel endpoint, which is gated only by a general auth check model.CheckAuth with no admin-role or read-only enforcement. This exposes 31 MCP tools, including a file tool with list/read/write/delete/rename/copy...

EUVD-2026-49043

SiYuan before v3.7.2 contains a missing authorization vulnerability in the POST /mcp kernel endpoint, which is gated only by a general auth check model.CheckAuth with no admin-role or read-only enforcement. This exposes 31 MCP tools, including a file tool with list/read/write/delete/rename/copy...

CVE-2026-66012 SiYuan before v3.7.2 Unauthenticated Administrator Takeover via MCP

SiYuan before v3.7.2 contains a missing authorization vulnerability in the POST /mcp kernel endpoint, which is gated only by a general auth check model.CheckAuth with no admin-role or read-only enforcement. This exposes 31 MCP tools, including a file tool with list/read/write/delete/rename/copy...

CVE-2026-66012 SiYuan before v3.7.2 Unauthenticated Administrator Takeover via MCP

SiYuan before v3.7.2 contains a missing authorization vulnerability in the POST /mcp kernel endpoint, which is gated only by a general auth check model.CheckAuth with no admin-role or read-only enforcement. This exposes 31 MCP tools, including a file tool with list/read/write/delete/rename/copy...

PT-2026-64762

Name of the Vulnerable Software and Affected Versions SiYuan versions prior to 3.7.2 Description A missing authorization issue exists in the 'POST /mcp' kernel endpoint, which is only protected by a general authentication check model.CheckAuth without enforcing admin roles or read-only...

EUVD-2026-42359

LiteLLM: MCP Authentication Bypass via OAuth2 Passthrough Fallback...

CVE-2026-55605 @arikusi/deepseek-mcp-server Missing Authentication on Self-Hosted HTTP MCP Endpoint

DeepSeek MCP Server is an MCP server for DeepSeek V4. Starting in version 1.4.2 and prior to version 1.8.0, the self-hosted HTTP transport of @arikusi/deepseek-mcp-server exposes POST /mcp without any authentication: createMcpExpressApp is called without an authProvider and no middleware guards t...

PT-2026-56972

Name of the Vulnerable Software and Affected Versions @arikusi/deepseek-mcp-server versions 1.4.2 through 1.7.x Description The self-hosted HTTP transport of the server exposes the POST /mcp endpoint without authentication. This occurs because the createMcpExpressApp function is called without an...

CVE-2026-58446 Presenton < 0.8.8-beta - Authentication Bypass of Session Auth via Unprotected MCP Endpoint

Presenton before 0.8.8-beta bundles an MCP server that, on server/Docker deployments configured with session authentication AUTHUSERNAME/AUTHPASSWORD, is reachable unauthenticated at /mcp because the nginx front-end does not apply the authrequest gate to that path and the MCP server auto-mints a...

CVE-2026-58446

CVE-2026-58446 affects Presenton before 0.8.8-beta. The MCP server deployed with session authentication in server/Docker setups is reachable unauthenticated at /mcp because the nginx front-end does not apply the auth gate to that path, and the MCP server auto-mints a valid internal session token ...

GHSA-2R68-G678-7QR3 mcp-memory-service: OAuth read-only clients can write and delete memories through MCP tools/call

Summary The HTTP MCP JSON-RPC endpoint at /mcp requires only OAuth read scope for all requests, then dispatches tools/call directly to handlers that include mutating tools. A read-only OAuth client can call storememory and deletememory through MCP even though the corresponding REST endpoints...