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CVE-2026-77083— n8n before 1.123.69 Code Node Sandbox Escape via Function.prototype Pollution

CVSS 6.0 · Medium EPSS 0.27% · P19

Affected Version Matrix 6

VendorProductVersion RangeStatus
n8n-ion8n< 1.123.69affected
1.123.69unaffected
2.34.0< 2.34.1affected
2.34.1unaffected
2.0.0< 2.33.4affected
2.33.4unaffected
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I. Basic Information for CVE-2026-77083

Vulnerability Information
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Vulnerability Title
n8n before 1.123.69 Code Node Sandbox Escape via Function.prototype Pollution
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
n8n-ion8n 0 ~ 1.123.69 -
n8n-ion8n 2.34.0 ~ 2.34.1 -
n8n-ion8n 2.0.0 ~ 2.33.4 -

II. Public POCs for CVE-2026-77083

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III. Intelligence Information for CVE-2026-77083

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Vendor Advisories for CVE-2026-77083 (1)

Exploits & Public PoCs for CVE-2026-77083 (1)

Same Patch Batch · n8n-io · 2026-08-20 · 17 CVEs total

CVE-2026-770808.7 HIGHn8n before 1.123.69 Arbitrary File Read and Write via Snowflake
CVE-2026-770688.7 HIGHn8n before 2.34.1 Remote Code Execution via Path Traversal
CVE-2026-770758.4 HIGHn8n before 1.123.69 Expression Injection via Resource Locator
CVE-2026-770728.4 HIGHn8n before 1.123.69 Stored XSS via Form Completion Page
CVE-2026-770847.7 HIGHn8n before 1.123.69 Remote Code Execution via Git Node Configuration Values
CVE-2026-770797.4 HIGHn8n before 2.34.1 Authorization Bypass via Custom Role Deletion
CVE-2026-770777.2 HIGHn8n before 1.123.69 Remote Code Execution via EventEmitter Prototype Pollution
CVE-2026-770717.1 HIGHn8n before 1.123.69 PostgREST Filter Injection via Supabase
CVE-2026-770767.1 HIGHn8n before 1.123.69 Credential Leak via GraphQL Node Error
CVE-2026-770707.1 HIGHn8n before 1.123.69 NoSQL Injection via MongoDB Node
CVE-2026-770856.3 MEDIUMn8n before 2.34.1 SSRF Protection Bypass via SearXNG Tool
CVE-2026-770746.0 MEDIUMn8n before 1.123.69 SSRF via Edit Image Node
CVE-2026-770735.3 MEDIUMn8n before 2.34.1 Cross-Project Credential Access via MCP
CVE-2026-770825.3 MEDIUMn8n before 1.123.69 ReDoS via Filter and Switch Node
CVE-2026-770815.1 MEDIUMn8n before 1.123.69 Allowed-Domains Bypass via GraphQL Node
CVE-2026-770692.3 LOWn8n before 1.123.69 SSRF Protection Bypass via OAuth2

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-1321

V. Comments for CVE-2026-77083

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