CVE-2026-18640

The NewNotebook API does not sufficiently sanitize its parameters allowing an authenticated user with NOTEBOOK_EDIT permission to write the notebook record outside the org's data store directory. The file written must have an extension of ".json.db" but can otherwise overwrite other metadata files (such as ACL records, hunts etc). This can corrupt these files and cause data corruption.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
http://docs.velociraptor.app/announcements/advisories/cve-2026-18640/

Configurations

No configuration.

History

23 Oct 2026, 19:10

Type	Values Removed	Values Added
Summary		(es) La API de NewNotebook no sanea suficientemente sus parámetros, permitiendo a un usuario autenticado con permiso NOTEBOOK_EDIT escribir el registro del cuaderno fuera del directorio de almacenamiento de datos de la organización. El archivo escrito debe tener una extensión de ’.json.db’ pero de lo contrario puede sobrescribir otros archivos de metadatos (como registros ACL, búsquedas, etc.). Esto puede corromper estos archivos y causar corrupción de datos.

Information

Published : 2026-08-11 16:17

Updated : 2026-10-23 19:10

NVD link : CVE-2026-18640

Mitre link : CVE-2026-18640

CVE.ORG link : CVE-2026-18640

JSON object : View

Products Affected

No product.

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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