CVE-2026-65599
n8n before 1.123.64, 2.29.8, and 2.30.1 Credential Exposure via JWT Header
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.
INFO
Published Date :
July 22, 2026, 12:18 p.m.
Last Modified :
Oct. 29, 2026, 8:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update n8n to version 1.123.64 or later.
- Update n8n to version 2.29.8 or later.
- Update n8n to version 2.30.1 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-65599.
| URL | Resource |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories/GHSA-9r8p-h6cc-6qhm | Mitigation Vendor Advisory |
| https://www.vulncheck.com/advisories/n8n-before-credential-exposure-via-jwt-header | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-65599 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-65599
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-65599 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-65599 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Oct. 29, 2026
Action Type Old Value New Value Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/65xxx/CVE-2026-65599.json">CVE-2026-65599</a> Added Reference https://github.com/n8n-io/n8n/security/advisories/GHSA-9r8p-h6cc-6qhm Added Reference https://www.vulncheck.com/advisories/n8n-before-credential-exposure-via-jwt-header Removed Reference https://github.com/n8n-io/n8n/security/advisories/GHSA-9r8p-h6cc-6qhm Removed Reference https://www.vulncheck.com/advisories/n8n-before-credential-exposure-via-jwt-header Removed Reference Type https://github.com/n8n-io/n8n/security/advisories/GHSA-9r8p-h6cc-6qhm Types: Mitigation, Vendor Advisory Removed Reference Type https://www.vulncheck.com/advisories/n8n-before-credential-exposure-via-jwt-header Types: Third Party Advisory -
CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Added Translation Title: n8n de n8n-io, Description: Las versiones de n8n anteriores a la 1.123.64, 2.29.8 y 2.30.1 contienen una vulnerabilidad de exposición de credenciales: cuando se configuraba con una clave de cuenta de servicio de Google, la clave privada PEM completa se colocaba erróneamente en el campo kid del encabezado JWT (destinado solo para un identificador de clave). Debido a que los encabezados JWT están codificados en Base64 en lugar de cifrados, la clave privada podía ser recuperada por cualquier cosa que registrara o inspeccionara el JWT. Un atacante que obtuviera la clave podría suplantar la cuenta de servicio y acceder o modificar cualquier recurso de Google Cloud que estuviera autorizado a usar. Solo las instancias que utilizan credenciales de cuenta de servicio de Google se ven afectadas. -
Initial Analysis by [email protected]
Jul. 27, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Added CPE Configuration OR *cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:* versions up to (excluding) 1.123.64 *cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:* versions from (including) 2.0.0 up to (excluding) 2.29.8 *cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:* versions up to (excluding) 1.123.64 *cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:* versions from (including) 2.0.0 up to (excluding) 2.29.8 *cpe:2.3:a:n8n:n8n:2.30.0:*:*:*:community:node.js:*:* *cpe:2.3:a:n8n:n8n:2.30.0:*:*:*:enterprise:node.js:*:* Added Reference Type VulnCheck: https://github.com/n8n-io/n8n/security/advisories/GHSA-9r8p-h6cc-6qhm Types: Mitigation, Vendor Advisory Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/n8n-before-credential-exposure-via-jwt-header Types: Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 22, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-65599', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-22T18:20:17.250346Z'} -
New CVE Received by [email protected]
Jul. 22, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'n8n-io', 'product': 'n8n', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.123.64', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '1.123.64', 'versionType': 'semver'}], 'packageURL': 'pkg:npm/n8n', 'defaultStatus': 'unaffected'}, {'vendor': 'n8n-io', 'product': 'n8n', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '2.30.1', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '2.30.1', 'versionType': 'semver'}], 'packageURL': 'pkg:npm/n8n', 'defaultStatus': 'unaffected'}, {'vendor': 'n8n-io', 'product': 'n8n', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '2.29.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '2.29.8', 'versionType': 'semver'}], 'packageURL': 'pkg:npm/n8n', 'defaultStatus': 'unaffected'}] 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. Added CVSS V4.0 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 Added CWE CWE-312 Added Reference https://github.com/n8n-io/n8n/security/advisories/GHSA-9r8p-h6cc-6qhm Added Reference https://www.vulncheck.com/advisories/n8n-before-credential-exposure-via-jwt-header