CVE-2026-72771: n8n before 2.32.1 Credential Restriction Bypass via AI/LLM Nodes

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-11 · updated 2026-10-29
Weakness: CWE-863

Description

n8n versions before 2.32.1 fail to enforce the Allowed HTTP Request Domains allowlist in multiple AI and LLM nodes when user-supplied base or endpoint URLs are configured. Low-privileged workflow editors with use-only access to shared credentials can redirect requests to attacker-controlled hosts and exfiltrate credential secrets for reuse against underlying services.

Affected products

n8n-io n8n: before 2.31.5; 2.32.0 (and their updates) — fixed in 2.31.5
n8n-io n8n: from 2.32.0 before 2.32.1 — fixed in 2.32.1

How to fix

Upgrade to a fixed version: n8n-io n8n 2.31.5; n8n-io n8n 2.32.1. Check the vendor advisory for mitigations.

References

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