GO-2026-5706 googleapis/mcp-toolbox: authentication bypass vulnerability in the generic opaque token validation path (validateOpaqueToken) in github.com/googleapis/mcp-toolbox

googleapis/mcp-toolbox: authentication bypass vulnerability in the generic opaque token validation path validateOpaqueToken in github.com/googleapis/mcp-toolbox...

GO-2026-5607 MCP Registry has an unauthenticated SSRF: HTTP namespace verification dials 6to4 / NAT64 / site-local IPv6 addresses, bypassing private-address allowlist in github.com/modelcontextprotocol/registry

MCP Registry has an unauthenticated SSRF: HTTP namespace verification dials 6to4 / NAT64 / site-local IPv6 addresses, bypassing private-address allowlist in github.com/modelcontextprotocol/registry...

CVE-2025-71336

Flowise before 3.0.6 affected versions 2.2.7-patch.1 and earlier contains an unsandboxed remote code execution vulnerability in the Custom MCP feature, which is designed to execute OS commands such as launching local MCP servers. Because Flowise's authentication and authorization model is minimal...

CVE-2025-71336 Flowise - Unsandboxed Remote Code Execution via Custom MCP

Flowise before 3.0.6 affected versions 2.2.7-patch.1 and earlier contains an unsandboxed remote code execution vulnerability in the Custom MCP feature, which is designed to execute OS commands such as launching local MCP servers. Because Flowise's authentication and authorization model is minimal...

CVE-2025-71336 Flowise - Unsandboxed Remote Code Execution via Custom MCP

Flowise before 3.0.6 affected versions 2.2.7-patch.1 and earlier contains an unsandboxed remote code execution vulnerability in the Custom MCP feature, which is designed to execute OS commands such as launching local MCP servers. Because Flowise's authentication and authorization model is minimal...

CVE-2025-71336

Flowise vulnerability: Unsandboxed remote code execution in Custom MCP. Affected: Flowise before 3.0.6 (2.2.7-patch.1 and earlier). Attack requires crafting a JSON payload and header x-request-from: internal to /api/v1/node-load-method/customMCP, taking advantage of minimal auth to execute OS com...

GO-2026-5390 MCP Gateway: Authority-injection and JWT/session bypass via the unauthenticated router hair-pin "router-key" / "mcp-init-host" path in github.com/Kuadrant/mcp-gateway

MCP Gateway: Authority-injection and JWT/session bypass via the unauthenticated router hair-pin "router-key" / "mcp-init-host" path in github.com/Kuadrant/mcp-gateway...

GO-2026-5251 googleapis/mcp-toolbox: authentication bypass vulnerability in the generic opaque token validation path (validateOpaqueToken) in github.com/googleapis/mcp-toolbox

googleapis/mcp-toolbox: authentication bypass vulnerability in the generic opaque token validation path validateOpaqueToken in github.com/googleapis/mcp-toolbox...

GO-2026-5144 MCP Toolbox for Databases: authenticated authorization bypass in github.com/googleapis/mcp-toolbox

MCP Toolbox for Databases: authenticated authorization bypass in github.com/googleapis/mcp-toolbox...

CVE-2026-54030

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.5, LibreChat's MCP OAuth implementation does not validate that the resource parameter from OAuth Protected Resource metadata RFC 9728 matches the configured MCP server URL, allowing a malicious MCP server to...

CVE-2026-54842

The CVE describes a Missing Authorization vulnerability in the WordPress Royal MCP plugin (Royal MCP) affecting versions up to 1.4.25. The issue is categorized as Broken Access Control with a CVSS v3.1 base score of 8.1 (HIGH), with network attack vector, low attack complexity, and privileges req...

EUVD-2026-39387

Missing Authorization vulnerability in Royal Plugins Royal MCP allows Exploiting Incorrectly Configured Access Control Security Levels. This issue affects Royal MCP: from n/a through 1.4.25...

CVE-2026-54842 WordPress Royal MCP plugin <= 1.4.25 - Broken Access Control vulnerability

Missing Authorization vulnerability in Royal Plugins Royal MCP allows Exploiting Incorrectly Configured Access Control Security Levels. This issue affects Royal MCP: from n/a through 1.4.25...

PT-2026-52615

Name of the Vulnerable Software and Affected Versions Flowise versions prior to 3.0.6 Description The Custom MCP feature, used for executing OS commands like launching local MCP servers, is unsandboxed. Due to a minimal authentication and authorization model lacking role-based access control, and...

PT-2026-52494

Name of the Vulnerable Software and Affected Versions LibreChat versions prior to 0.8.5 Description LibreChat is an enhanced ChatGPT clone supporting multiple AI providers. The MCP OAuth implementation fails to validate that the resource parameter from OAuth Protected Resource metadata RFC 9728...

CVE-2026-53766

Chrome DevTools for agents chrome-devtools-mcp lets your coding agent control and inspect a live Chrome browser. From 0.24.0 until 1.1.0, McpContext.validatePath enforces workspace roots by checking whether path.resolvefilePath textually falls under one of the configured root paths. path.resolve...

CVE-2026-53765

Chrome DevTools for agents chrome-devtools-mcp lets your coding agent control and inspect a live Chrome browser. From 0.20.0 until 1.1.0, The chrome-devtools-mcp daemon writes its PID file with fs.writeFileSync to a deterministic runtime path. On typical macOS environments, and on Linux sessions...

CVE-2026-53765

CVE-2026-53765 / GHSA-3PVJ-JV98-QHJQ affects chrome-devtools-mcp (Chrome DevTools for agents). The vulnerability occurs when the daemon writes its PID file to a deterministic runtime path under /tmp on POSIX systems (macOS or Linux with XDG_RUNTIME_DIR unset). The code uses fs.writeFileSync() wit...

CVE-2026-53766 chrome-devtools-mcp: validatePath() does not canonicalize symlinks before enforcing roots

Chrome DevTools for agents chrome-devtools-mcp lets your coding agent control and inspect a live Chrome browser. From 0.24.0 until 1.1.0, McpContext.validatePath enforces workspace roots by checking whether path.resolvefilePath textually falls under one of the configured root paths. path.resolve...

CVE-2026-53766 chrome-devtools-mcp: validatePath() does not canonicalize symlinks before enforcing roots

Chrome DevTools for agents chrome-devtools-mcp lets your coding agent control and inspect a live Chrome browser. From 0.24.0 until 1.1.0, McpContext.validatePath enforces workspace roots by checking whether path.resolvefilePath textually falls under one of the configured root paths. path.resolve...