CVE-2026-18640
HighCVSS 7.1Exploitation Probability (EPSS)
Low risk24th percentile - higher than 24% of all known CVEs
Summary
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 overwrite other metadata files, causing data corruption.
Risk Assessment
The risk includes potential corruption of metadata files, leading to data integrity issues and system disruption. It may also allow unauthorized modifications.
Recommendation
Upgrade the software to a patched version and implement proper parameter sanitization in the NewNotebook API. Also restrict user permissions.
Original NVD description (English source)
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.