CVE-2026-65589: n8n before 1.123.64 Credential Exposure via LLM Node Execution Data

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-22 · updated 2026-10-29
Weakness: CWE-532

Description

n8n versions before 1.123.64 fail to properly mask custom HTTP header credentials in LLM sub-node execution data, writing plaintext API keys and secrets to workflow execution records. Authenticated users with access to execution data can read exposed header values and credentials that persist in the database and can be exported.

Affected products

n8n-io n8n: before 1.123.64; from 2.0.0 before 2.29.8; 2.30.0 (and their updates) — fixed in 1.123.64, 2.29.8
n8n-io n8n: before 1.123.64 — fixed in 1.123.64

How to fix

Upgrade to a fixed version: n8n-io n8n 1.123.64, 2.29.8; n8n-io n8n 1.123.64. Check the vendor advisory for mitigations.

References

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