CVE-2026-65599 n8n before 1.123.64, 2.29.8, and 2.30.1 Credential Exposure via JWT Header
Attackers can recover Google Service Account private keys from JWT headers, allowing impersonation and unauthorized access to cloud resources.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-65599?
CVE-2026-65599 is a medium-severity vulnerability in N8n N8n, published on 22 Jul 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-312
Which versions are affected by CVE-2026-65599?
6 open source packages ship an affected version, including n8n. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
n8n npm | All versions | 1.123.64 |
n8n npm | All versions | 1.123.64 |
n8n npm | From 2.0.0-rc.0 | 2.29.8 |
n8n npm | From 2.0.0-rc.0 | 2.29.8 |
n8n npm | From 2.30.0 | 2.30.1 |
n8n npm | From 2.30.0 | 2.30.1 |
Products include N8n N8n.
How do I fix CVE-2026-65599?
Upgrade n8n to a fixed version for your release line: 1.123.64, 2.29.8 or 2.30.1.
Is CVE-2026-65599 being exploited?
There is no known exploitation of CVE-2026-65599 in the wild and no public exploit code.
Other vulnerabilities in N8n N8n
- CVE-2025-68613 n8n Improper Control of Dynamically-Managed Code Resources
- CVE-2026-21877 n8n is vulnerable to Remote Code Execution via Arbitrary File Write
- CVE-2026-21858 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling
- CVE-2026-1470 n8n Unsafe Workflow Expression Evaluation Allows Remote Code Execution
- CVE-2025-68668 n8n Vulnerable to Arbitrary Command Execution in Pyodide based Python Code Node
Sources
Also known as GHSA-9r8p-h6cc-6qhm, MINI-3pxj-7ffq-3v83.