n8n before 2.34.1 Authorization Bypass via Custom Role Deletion

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• n8n n8nbefore 2.33.4
• n8n n8n2.34.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

• n8n-io n8n

  • 2.34.1, 2.33.4not affected
  • 2.34.0 and later · before 2.34.1affected · semver
  • 2.0.0 and later · before 2.33.4affected · semver

Other highest-scoring records for the same primary product.

• CVE-2025-68613n8n Vulnerable to Remote Code Execution via Expression InjectionKEV
  95Now
• CVE-2026-21858n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling
  64This week
• CVE-2026-1470Authenticated users can bypass the Expression sandbox mechanism to achieve full remote code execution on n8n’s main node.
  45Plan
• CVE-2025-68668n8n Vulnerable to Arbitrary Command Execution in Pyodide based Python Code Node
  43Plan
• CVE-2026-0863Sandbox escape in n8n Python task runner allows for arbitrary code execution on the underlying host.
  42Plan
• CVE-2026-21877n8n is vulnerable to Remote Code Execution via Arbitrary File Write
  41Plan

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

The endpoint fetches the record by the ID sent in the request, but never checks whether the record belongs to the requesting user.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1const invoice = await Invoice.findById(req.params.id);2res.json(invoice);

1const invoice = await Invoice.findOne({2  id: req.params.id,3  ownerId: req.user.id,4});5if (!invoice) return res.sendStatus(404);6res.json(invoice);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.