CVE-2026-72769
6.1
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| n8n-io | n8n | 0 < 1.123.67 | affected |
| n8n-io | n8n | 1.123.67 | unaffected |
| n8n-io | n8n | 0 < 2.32.1 | affected |
| n8n-io | n8n | 2.32.1 | unaffected |
| n8n-io | n8n | 0 < 2.31.5 | affected |
| n8n-io | n8n | 2.31.5 | unaffected |
Weaknesses
- CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-hx4h-vr3m-45vh
- https://www.vulncheck.com/advisories/n8n-before-prototype-pollution-via-vm-expression-engine
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