n8n before 1.123.69 Code Node Sandbox Escape via Function.prototype Pollution
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
n8n is a workflow automation platform. In versions prior to 1.123.69, 2.33.4, and 2.34.1, the JavaScript Code node's VM sandbox did not freeze the sandbox's Function.prototype, allowing an authenticated user with the ability to create and execute workflows to pollute it from within a Code node execution and recover a reference to the host's globalThis, resulting in a sandbox escape. The full exploit chain additionally depends on specific modules being available as allowlisted imports in the deployment's configuration. The issue is fixed in versions 1.123.69, 2.33.4, and 2.34.1.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| n8n | n8n | before 1.123.69 | 1.123.69 | Patch available | CNA |
| n8n | n8n | 2.34.0 to before 2.34.1 | 2.34.1 | Patch available | CNA |
| n8n | n8n | 2.0.0 to before 2.33.4 | 2.33.4 | Patch available | CNA |
Remediation
- Fix · CNA n8n (n8n-io) Fixed in 1.123.69
- Fix · CNA n8n (n8n-io) Fixed in 2.34.1
- Fix · CNA n8n (n8n-io) Fixed in 2.33.4
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
n8n-io n8n 2.33.4, 2.34.1
17 records Highest priority Priority MEDIUM 2 MEDIUM, 15 LOW
Other records, highest priority first
- TI-2026-53821 n8n before 2.34.1 Remote Code Execution via Path TraversalPriority MEDIUM 41
- TI-2026-53833 n8n before 1.123.69 Arbitrary File Read and Write via SnowflakePriority MEDIUM 40
- TI-2026-53832 n8n before 2.34.1 Authorization Bypass via Custom Role DeletionPriority LOW 39
- Release ·
n8n-io n8n 1.123.69
13 records Highest priority Priority MEDIUM 1 MEDIUM, 12 LOW
Other records, highest priority first
- TI-2026-53833 n8n before 1.123.69 Arbitrary File Read and Write via SnowflakePriority MEDIUM 40
- TI-2026-53825 n8n before 1.123.69 Stored XSS via Form Completion PagePriority LOW 38
- TI-2026-53837 n8n before 1.123.69 Remote Code Execution via Git Node Configuration ValuesPriority LOW 37
Timeline
- 2026-10-02 Threatist record created from CVE-2026-77083
- 2026-10-03 Alias added: GHSA-2664-hr5v-554w
References
More N8n vulnerabilities
- TI-2025-42131 n8n Vulnerable to Remote Code Execution via Expression Injection KEVCVSS 3.1CRITICAL 10.0
- TI-2026-17560 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling CVSS 3.1CRITICAL 10.0
- TI-2026-01167 Authenticated users can bypass the Expression sandbox mechanism to achieve full remote… CVSS 3.1CRITICAL 9.9
- TI-2026-00644 Sandbox escape in n8n Python task runner allows for arbitrary code execution on the underlying host. CVSS 3.1CRITICAL 9.9
- TI-2025-35293 An arbitrary file upload vulnerability in the Chat Trigger component of N8N v1.95.3… CVSS 3.1HIGH 8.8
- TI-2023-12275 The n8n package 0.218.0 for Node.js allows Escalation of Privileges. CVSS 3.1HIGH 8.8
Sources
- CVE-2026-77083 · CVE Program
- CVE-2026-77083 · NVD
- FIRST EPSS
- GHSA-2664-hr5v-554w · GitHub Advisory Database · CC BY 4.0
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