n8n: "Allowed HTTP Request Domains" Restriction Bypass via AI Agents MCP Connector
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
agentsfrom theN8N_ENABLED_MODULESenvironment 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.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de npm | n8n | >= 2.28.0, < 2.28.1, < 2.27.4 | 2.28.1, 2.27.4 |
Referencias
- Vector CVSS
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N- Debilidad (CWE)
CWE-693- Plataforma
- npm
- Paquete
n8n- Publicada
- 22.07.2026
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-h44j-f5r5-ph73 - CC BY 4.0
Historial de vulnerabilidades: n8n
Todas las vulnerabilidades publicadas de este paquete (Paquete de npm), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 156
- Primera → última
- 05.2023 09.2026
- Sin corrección
- 1
- Explotada en ataques
- 1
Distribución por gravedad
- Crítica 24
- Alta 58
- Media 74
Divulgaciones por año
- 2023: 3
- 2024: 0
- 2025: 14
- 2026: 139
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