CVE-2026-72769
highn8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the VM expression engine.
Vendor / product: N8n — n8n
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
8.1
8.1 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-08-11 13:19
Modified: 2026-10-29 20:17
NVD status: Analyzed
Last synced 10 hours ago
Verified against the source API 2026-10-29 20:26 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
n8n / n8n <1.123.67, ≥2.0.0 <2.31.5, 2.32.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://github.com/n8n-io/n8n/security/advisories/GHSA-hx4h-vr3m-45vh
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-hx4h-vr3m-45vh disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/n8n-before-prototype-pollution-via-vm-expression-engi... disclosure@vulncheck.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-29 20:26 UTC · record ↗