CVE-2026-85169 n8n before 1.123.73 Remote Code Execution via $fromAI Prototype Leak

What is CVE-2026-85169?

CVE-2026-85169 is a high-severity code injection vulnerability in N8n N8n, published on 3 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

n8n versions before 1.123.73, 2.35.4, and 2.36.2 contain an expression sandbox escape in the $fromAI handler. $fromAI resolved a caller-supplied placeholder name without requiring it to be an own property and admitted reserved keys; against a primitive input value it returned a live host-prototype reference. An attacker with workflow-build privilege can walk the prototype chain to the Function constructor and compile/execute arbitrary code in the main n8n process, leading to remote code execution.

Weakness: CWE-94

Which versions are affected by CVE-2026-85169?

It affects 1 product.

Products include N8n N8n.

How do I fix CVE-2026-85169?

Upgrade to a fixed version.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2026-85169 being exploited?

There is no known exploitation of CVE-2026-85169 in the wild and no public exploit code.

Other vulnerabilities in N8n N8n

• CVE-2025-68613 n8n Improper Control of Dynamically-Managed Code Resources Exploited Critical 10.0
• CVE-2026-21877 n8n is vulnerable to Remote Code Execution via Arbitrary File Write Critical 10.0
• CVE-2026-21858 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling Critical 10.0
• CVE-2026-1470 n8n Unsafe Workflow Expression Evaluation Allows Remote Code Execution Critical 9.9
• CVE-2025-68668 n8n Vulnerable to Arbitrary Command Execution in Pyodide based Python Code Node Critical 9.9

All N8n N8n vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• GitHub advisory
• How this page is made

Also known as GHSA-733v-xpr6-gwgq, GHSA-9x83-43r8-5hwc, MINI-3fpp-j2w5-mcr3.