CVE Watch20 ago 2026

CVE-2026-77077

n8n versions before 1.123.69, 2.33.4, and 2.34.1 contain a JavaScript task runner VM sandbox escape. The runner's prototype-freezing routine

CVSS

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Sin CVSS

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 20 ago 2026 · Última mod.: 20 ago 2026 · CWE-94

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

n8n versions before 1.123.69, 2.33.4, and 2.34.1 contain a JavaScript task runner VM sandbox escape. The runner's prototype-freezing routine covers globalThis functions but not internal module constructors such as EventEmitter, allowing an authenticated user with Code node access to exploit prototype pollution to execute arbitrary commands within the runner container. Because the polluted prototype is a process-wide object, the corruption persists across other tenants' Code node executions on the same shared runner. On v1.x instances without task runners enabled, Code node JavaScript runs directly in the main n8n process, where the impact could be higher.

Referencias oficiales

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