n8n: "Allowed HTTP Request Domains" Restriction Bypass via AI Agents MCP Connector
- Product
- n8n
- CVE
- CVE-2026-59207
- Affected
- n8n >= 2.28.0, < 2.28.1 and n8n < 2.27.4
- Fixed in
- 2.28.1 and 2.27.4
Last verified against sources: October 26, 2026
Am I affected?
n8n: affected n8n >= 2.28.0, < 2.28.1 and n8n < 2.27.4. Fixed in 2.28.1 and 2.27.4.
- Check your version: run
npm ls n8n. Versions >= 2.28.0, < 2.28.1 of n8n are affected. [1]
What to do now
- Upgrade to the fixed version: run
npm install n8n@2.28.1(first patched version 2.28.1). [1] - Upgrade to n8n version 2.28.1 or 2.27.4 or later. [1]
- Disable the AI Agents module by removing
agentsfrom theN8N_ENABLED_MODULESenvironment variable. [1] - Restrict credential sharing to fully trusted users only. [1]
- Audit credentials with domain restrictions for unexpected sharing relationships. [1]
General practice, not from the source: if the affected software could read tokens or credentials, rotate them after upgrading; pin versions and review changes before updating tools your agents run.
What happened
- The AI Agents feature did not enforce the "Allowed HTTP Request Domains" restriction configured on credentials. [1]
- This issue only affects instances where the AI Agents module is enabled via
N8N_ENABLED_MODULES=agentsand at least one credential with domain restrictions has been shared with a member-level user. [1]
Impact
- A member-level user who had been granted use-only access to a shared credential could cause its secret to be sent to an external server they control, by pointing an MCP tool at an arbitrary URL and running the agent. [1]
What was done
Sources
- GHSA-h44j-f5r5-ph73 — GitHub Advisory Database
Every statement above was checked against these sources before publishing. Spotted an error? Tell us and we will correct it with a dated note.
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[CVE-2026-59207] n8n: "Allowed HTTP Request Domains" Restriction Bypass via AI Agents MCP Connector
Product: n8n | Affected: n8n >= 2.28.0, < 2.28.1 and n8n < 2.27.4 | Fixed in: 2.28.1 and 2.27.4
Summary: The AI Agents feature did not enforce the "Allowed HTTP Request Domains" restriction configured on credentials.
Source & remediation on AgentArmorHQ: https://agentarmorhq.com/incidents/2026/07/cve-2026-59207-n8nCorrections
Report an error or request a correction. We review requests within 5 business days and add a dated correction note.
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