CVE-2026-65599

n8n before 1.123.64, 2.29.8, and 2.30.1 Credential Exposure via JWT Header

Published Jul 22, 2026 CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Description
n8n versions before 1.123.64, 2.29.8, and 2.30.1 contain a credential exposure vulnerability: when configured with a Google Service Account key, the full PEM private key was mistakenly placed in the JWT header's kid field (intended only for a key identifier). Because JWT headers are Base64-encoded rather than encrypted, the private key could be recovered by anything that logged or inspected the JWT. An attacker who obtained the key could impersonate the service account and access or modify any Google Cloud resource it was authorized to use. Only instances using Google Service Account credentials are affected.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-9r8p-h6cc-6qhm n8n: Google Service Account Private Key Exposed in JWT Header
History
Type Values Removed Values Added
Title n8n before 1.123.64 Credential Exposure via JWT Header n8n before 1.123.64, 2.29.8, and 2.30.1 Credential Exposure via JWT Header
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description n8n versions before 1.123.64, 2.29.8, and 2.30.1 contain a credential exposure vulnerability: when configured with a Google Service Account key, the full PEM private key was mistakenly placed in the JWT header's kid field (intended only for a key identifier). Because JWT headers are Base64-encoded rather than encrypted, the private key could be recovered by anything that logged or inspected the JWT. An attacker who obtained the key could impersonate the service account and access or modify any Google Cloud resource it was authorized to use. Only instances using Google Service Account credentials are affected.
Title n8n before 1.123.64 Credential Exposure via JWT Header
First Time appeared N8n
N8n n8n
Weaknesses CWE-312
CPEs cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*
Vendors & Products N8n
N8n n8n
References
Metrics cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 29, 2026, 9:16 PM
Reserved
Jul 22, 2026, 10:48 AM
Status
Analyzed
Published
Jul 22, 2026, 12:18 PM
Modified
Oct 29, 2026, 8:17 PM