CVE-2026-77083

published 2026-08-20

CVE-2026-77083: 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…

Priority P3 39 medium 5.9 CVSS 3.1

AV N AC H PR L UI N S U C H I L A N

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.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
n8n-io	n8n	< 1.123.69	1.123.69
n8n-io	n8n	>= 2.0.0 < 2.33.4	2.33.4
n8n-io	n8n	>= 2.34.0 < 2.34.1	2.34.1
n8n	n8n	< 1.123.69	1.123.69
n8n	n8n	—	—
n8n	n8n	>= 2.0.0 < 2.33.4	2.33.4

CVSS provenance

nvd v3.1 5.9 MEDIUM CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N

nvd v4.0 6.0 MEDIUM 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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CWE-1321