AI Threat Alert
CVE-2026-72769
AWAITING NVDn8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the VM expression engine. An authenticated user able to create or edit a workflow expression can abuse the engine's array-element access to obtain a reference to a host built-in and pollute its prototype in the...
Full CISO analysis pending enrichment.
How severe is it?
What should I do?
No patch available
Monitor for updates. Consider compensating controls or temporary mitigations.
Which compliance frameworks are affected?
Compliance analysis pending. Sign in for full compliance mapping when available.
Frequently Asked Questions
What is CVE-2026-72769?
n8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the VM expression engine. An authenticated user able to create or edit a workflow expression can abuse the engine's array-element access to obtain a reference to a host built-in and pollute its prototype in the main n8n process (a sandbox escape), leading to a denial of service. Both self-hosted and cloud instances running the VM expression engine are affected.
Is CVE-2026-72769 actively exploited?
No confirmed active exploitation of CVE-2026-72769 has been reported, but organizations should still patch proactively.
How to fix CVE-2026-72769?
No patch is currently available. Monitor vendor advisories for updates.
What is the CVSS score for CVE-2026-72769?
No CVSS score has been assigned yet.
What are the technical details?
Original Advisory
n8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the VM expression engine. An authenticated user able to create or edit a workflow expression can abuse the engine's array-element access to obtain a reference to a host built-in and pollute its prototype in the main n8n process (a sandbox escape), leading to a denial of service. Both self-hosted and cloud instances running the VM expression engine are affected.
Weaknesses (CWE)
CWE-1321 — Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution'): The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.
- [Implementation] By freezing the object prototype first (for example, Object.freeze(Object.prototype)), modification of the prototype becomes impossible.
- [Architecture and Design] By blocking modifications of attributes that resolve to object prototype, such as proto or prototype, this weakness can be mitigated.
Source: MITRE CWE corpus.