CVE-2026-126391
n8n before 1.123.89 RCE via Workflow Expression Evaluation Sandbox Escape
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
n8n before 1.123.89 contains an insufficient isolation vulnerability in workflow expression evaluation that allows authenticated users to escape the sandbox. Attackers with permission to create or modify workflows can craft expressions referencing unexpected JavaScript properties to execute arbitrary code on the n8n host.
| CWE | CWE-94 |
| Vendor | n8n-io |
| Product | n8n |
| Published | Nov 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
n8n-io / n8n
0 < 1.123.89
n8n-io / n8n
2.46.0 < 2.46.1
n8n-io / n8n
2.0.0 < 2.45.5
n8n-io / n8n
3.0.0 < 3.0.1
References
Credits
🔍 NumberOreo1 🔍 0xNasu