PT-2026-63357 · N8N Io · N8N

Sladkani · CVE-2026-65599 · Published 2026-07-22 · Updated 2026-07-22

NVD

CVSS v4.0

5.1

Medium

Base vector

AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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.

Fix

Cleartext Storage of Sensitive Information

Weakness Enumeration

CWE-312

Related Identifiers

CVE-2026-65599

Affected Products

N8N

References · 3

• https://github.com/n8n-io/n8n/security/advisories/GHSA-9r8p-h6cc-6qhm · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-65599 · Security Note
• https://vulncheck.com/advisories/n8n-before-credential-exposure-via-jwt-header · Note