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EUVD-2026-335425

fkie_cve-2026-59207

n8n is an open source workflow automation platform. Prior to 2.27.4 and 2.28.1, the AI Agents feature did not enforce the Allowed HTTP Request Domains restriction configured on credentials when an MCP tool was pointed at an arbitrary URL, allowing a member-level user with use-only access to a shared credential to send its secret to an external server they control. This issue is fixed in versions 2.27.4 and 2.28.1.

GHSA-h44j-f5r5-ph73 — n8n: "Allowed HTTP Request Domains" Restriction Bypass via AI Agents MCP Connector

Affected: npm: n8n

## Impact The AI Agents feature did not enforce the "Allowed HTTP Request Domains" restriction configured on credentials. As a result, 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.

This issue only affects instances where the AI Agents module is enabled via `N8N_ENABLED_MODULES=agents` and at least one credential with domain restrictions has been shared with a member-level user.

## Patches The issue has been fixed in n8n version 2.28.1 and 2.27.4. Users should upgrade to this version or later to remediate the vulnerability.

## Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Disable the AI Agents module by removing `agents` from the `N8N_ENABLED_MODULES` environment variable. - Restrict credential sharing to fully trusted users only. - Audit credentials with domain restrictions for unexpected sharing relationships.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

NCSC-2026-0228 — Kwetsbaarheden verholpen in n8n workflow automation platform

NCSC-2026-0228

WID-SEC-W-2026-2067 — n8n: Mehrere Schwachstellen

Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in n8n ausnutzen, um SQL-Injection durchzuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, Daten zu manipulieren oder einen Denial-of-Service-Zustand zu verursachen.