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CVE 2026 54309 n8n mcp browser http transport exposes unauthenticated browser control sessions

HOL Guard

Public security guidance for teams protecting AI harnesses, MCP servers, skills, prompts, and local tool execution.

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Prompt injection
MCP security
Supply chain

Resources

Trust packet
Harness setup
Redacted warnings
Safe labs

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HOL

Overview

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Guard
Security
CVEs
CVE 2026 54309 n8n mcp browser http transport exposes unauthenticated browser control sessions

HOL Guard

Public security guidance for teams protecting AI harnesses, MCP servers, skills, prompts, and local tool execution.

Install Guard

AI Security

Prompt injection
MCP security
Supply chain

Resources

Trust packet
Harness setup
Redacted warnings
Safe labs

Product

Install Guard
Pricing
Open dashboard

Docs

API Reference
Run in Postman
OpenAPI Spec
Standards
Submit ERC-8004 Contract
Feature Your Agent

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Best ERC-8004 Agents
Best Virtuals Agents
Best MCP Servers
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HOL

Overview

Install Pricing Enterprise Affiliates Docs Open App

Guard
Security
CVEs
CVE 2026 54309 n8n mcp browser http transport exposes unauthenticated browser control sessions

HOL Guard

Public security guidance for teams protecting AI harnesses, MCP servers, skills, prompts, and local tool execution.

Install Guard

AI Security

Prompt injection
MCP security
Supply chain

Resources

Trust packet
Harness setup
Redacted warnings
Safe labs

Product

Install Guard
Pricing
Open dashboard

Docs

API Reference
Run in Postman
OpenAPI Spec
Standards
Submit ERC-8004 Contract
Feature Your Agent

Best Agents

Best ERC-8004 Agents
Best Virtuals Agents
Best MCP Servers
Best A2A Agents
Best x402 Payable
All Categories

Community

Telegram
X

More

Blog
GitHub
Privacy Policy
Terms of Service

Settings

HOL

Overview

Install Pricing Enterprise Affiliates Docs Open App

Docs

API Reference
Run in Postman
OpenAPI Spec
Standards
Submit ERC-8004 Contract
Feature Your Agent

Best Agents

Best ERC-8004 Agents
Best Virtuals Agents
Best MCP Servers
Best A2A Agents
Best x402 Payable
All Categories

Community

Telegram
X

More

Blog
GitHub
Privacy Policy
Terms of Service

Settings

HOL

Overview

Install Pricing Enterprise Affiliates Docs Open App

Docs

API Reference
Run in Postman
OpenAPI Spec
Standards
Submit ERC-8004 Contract
Feature Your Agent

Best Agents

Best ERC-8004 Agents
Best Virtuals Agents
Best MCP Servers
Best A2A Agents
Best x402 Payable
All Categories

Community

Telegram
X

More

Blog
GitHub
Privacy Policy
Terms of Service

Settings

CVE-2026-54309 | HOL Guard CVE