CVE-2026-72769n8n before 1.123.67 Prototype Pollution via VM Expression Engine
Updated under an hour ago ()
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It affects n8n-io n8n and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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.
- CVSS
- 6.1 MEDIUM (v4.0, CNA)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
- Weakness (CWE)
- CWE-1321
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Analyzed
- Record last updated
- Aug 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
n8n-io n8n n8n_io:n8n (from the name) | before 1.123.67; 1.123.67 not affected | CNA record |
n8n n8n n8n:n8n | before 1.123.67; from 2.0.0 before 2.31.5; 2.32.0 | NVD |
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-hx4h-vr3m-45vhvendor-advisory, mitigation
- https://www.vulncheck.com/advisories/n8n-before-prototype-pollution-via-vm-expression-enginethird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.