n8n Sandbox Escape Lets Workflow Editors Run OS Commands as the n8n Process

n8n has patched a high-severity expression-sandbox escape that could let an authenticated workflow editor execute operating-system commands on the server running the automation platform. Security Joes found the flaw while probing n8n's February fix for CVE-2026-27577 for another bypass. The...

NPM: n8n: Unauthenticated Endpoint Allows Cancellation of Any User's Active Test Webhook

NPM: n8n: Unauthenticated Endpoint Allows Cancellation of Any User's Active Test Webhook vulnerability discovered by ? in WordPress Npm n8n versions 2.27.4...

GHSA-Q5XF-XHWF-CWQF n8n: Member-Level Users Can Execute Other Users' MCP Server Trigger Workflows via Missing OAuth Authorization Check

Impact The OAuth 2.1 consent and token-issuance flow introduced in n8n 2.27.0 does not verify that the authenticated user has access to the workflow referenced as the OAuth resource. A member-level user can register an OAuth client, self-approve consent for another user's n8n OAuth2-protected MCP...

NPM: n8n: External Secrets Permission Bypass via Expression Parser Mismatch

NPM: n8n: External Secrets Permission Bypass via Expression Parser Mismatch vulnerability discovered by ? in WordPress Npm n8n versions 1.123.61...

n8n: Expression sandbox escape via arrow-function bodies enabling command execution

Impact An authenticated user with permission to create or modify workflows could abuse crafted expressions using arrow functions to bypass the expression sandbox, triggering unintended system command execution on the host running n8n. Patches The issue has been fixed in n8n versions 2.31.5 and...

GHSA-64XH-79J6-R5V8 n8n: Bypass "Allowed HTTP Request Domains" Credential Restriction in Multiple AI and LLM Nodes

Impact The credential "Allowed HTTP Request Domains" allowlist was intended to restrict which hosts a credential's secret could be sent to, protecting shared credentials from users who could use but not view them. Several AI/LLM nodes did not enforce this allowlist when a user-supplied base or...

n8n: Legacy Expression Evaluator Sanitizer Bypass Leads to Authenticated Code Execution

Impact The legacy expression evaluator's computed-member sanitizer can be bypassed by an authenticated user with workflow create or modify permissions. Successful exploitation grants the attacker host-level code execution as the n8n process. The legacy expression engine is the default engine in...

n8n: DOM-Based XSS via Unsandboxed iframe srcdoc in HTML Preview

Impact The HTML preview renders execution output into an iframe srcdoc without sandbox, so a sanitizer bypass lets injected script run same-origin as the editor. When a victim opens the preview, it can call authenticated APIs with their session. An account with global:member privileges can exploi...

Insertion of Sensitive Information into Log File

Overview n8n is a n8n Workflow Automation Tool Affected versions of this package are vulnerable to Insertion of Sensitive Information into Log File in the process that handles HTTP header credentials in LLM sub-node execution data. An attacker can obtain sensitive API keys and secrets by accessin...

GHSA-38FJ-36M5-783C Duplicate Advisory: Authenticated SSRF via Dynamic Node Parameters Endpoints Allows Internal Network Access

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-9w78-79q7-r4fp. This link is maintained to preserve external references. Original Description n8n versions before 1.123.64 contain a server-side request forgery vulnerability in the dynamic-node-parameters...

GHSA-W46P-W7W2-FR9G Duplicate Advisory: AI Agents Project Viewer Privilege Escalation via run_node_tool

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-x5vx-c2c8-m3w9. This link is maintained to preserve external references. Original Description n8n versions before 2.30.1 contain a privilege escalation vulnerability in the AI Agents feature where the...

CVE-2026-65599 n8n before 1.123.64, 2.29.8, and 2.30.1 Credential Exposure via JWT Header

n8n versions before 1.123.64, 2.29.8, and 2.30.1 contain a credential exposure vulnerability: when configured with a Google Service Account key, the full PEM private key was mistakenly placed in the JWT header's kid field intended only for a key identifier. Because JWT headers are Base64-encoded...

EUVD-2026-47630

n8n before 2.28.0 and before 2.27.4 on the 2.27.x branch registers the DELETE /$restEndpoint/test-webhook/:id endpoint before authentication middleware is applied, allowing any unauthenticated network caller who knows a workflow ID to cancel that workflow's active test webhook registration. The...

PT-2026-63357

n8n versions before 1.123.64, 2.29.8, and 2.30.1 contain a credential exposure vulnerability: when configured with a Google Service Account key, the full PEM private key was mistakenly placed in the JWT header's kid field intended only for a key identifier. Because JWT headers are Base64-encoded...

Exploit for Improper Input Validation in N8N

n8n-cve-2026-2185...

CVE-2026-56352

CVE-2026-56352 affects n8n prior to 2.19.3. The legacy ExecuteWorkflow node’s localFile source can read workflow files from disk without the standard file-access checks, even though this behavior is hidden from the UI since v1.2. An authenticated user who can create or modify workflows can supply...

CVE-2026-56352 n8n - Arbitrary File Read and Execution via ExecuteWorkflow localFile Parameter

n8n before 2.19.3 contains a file path restriction bypass in the legacy ExecuteWorkflow node's localFile source option, which reads workflow files from disk without the file-access checks enforced by other file-reading nodes. Although hidden from the UI since v1.2, it remains reachable via the RE...

EUVD-2026-44624

n8n before version 2.10.0 contains an input validation vulnerability in the Guardrail node that allows attackers to bypass default guardrail instructions. End users can craft malicious inputs to circumvent guardrail protections and compromise workflow integrity...

GHSA-2VWW-6P9H-5G8J Duplicate Advisory: Authenticated Users Can Exhaust Temporary Disk Storage via Data-Table File Uploads

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-w867-jm58-p9pv. This link is maintained to preserve external references. Original Description n8n before 2.28.0 and before 1.123.58 on the 1.x branch contains a disk space exhaustion vulnerability in the...

CVE-2026-58661

n8n before 2.28.0 and before 1.123.58 on the 1.x branch contains a disk space exhaustion vulnerability in the data-table file upload endpoint. The per-request quota check does not account for files already written to the shared temporary directory, allowing an authenticated user to repeatedly...