CVE-2026-61647 Details
Description
NotebookLM MCP is an MCP server and HTTP service for interacting with Google NotebookLM and exporting generated content to local vault directories. Versions 1.6.0 through 2.0.2 contain a path traversal vulnerability in the `POST /batch-to-vault` endpoint, also exposed through the `batch_to_vault` MCP tool beginning in version 1.7.0, because attacker-controlled `vault_dir` and `slug_prefix` values can cause Markdown and JSON files to be written outside the intended vault directory to any location writable by the server process. Version 2.0.3 sanitizes `slug_prefix` and supports vault containment when `NOTEBOOKLM_VAULT_ROOT` is configured; containment is not enabled if that variable is unset. Users unable to upgrade should run the server as a dedicated unprivileged account restricted to the intended vault, keep the HTTP endpoint limited to localhost, and validate `vault_dir` values supplied by LLMs processing untrusted content.
A path traversal vulnerability has been identified in NotebookLM MCP versions 1.6.0 prior to 2.0.3. The issue resides in the 'POST /batch-to-vault' endpoint and the 'batch_to_vault' MCP tool, starting from version 1.7.0. The vulnerability allows attacker-controlled 'vault_dir' and 'slug_prefix' values to write Markdown and JSON files outside the designated vault directory, to any location writable by the server process. In a multi-user context or when the MCP server processes untrusted content, this could lead to planting files in sensitive locations for exploitation.
Users can upgrade to NotebookLM MCP version 2.0.3, which includes the patch for this vulnerability. After upgrading, it is important to set the 'NOTEBOOKLM_VAULT_ROOT' environment variable to a directory that should contain all vault writes. For users unable to upgrade, it is recommended to run the MCP server under a dedicated unprivileged user with write access only to the intended vault directory, limit the HTTP '/batch-to-vault' endpoint exposure to localhost, and validate 'vault_dir' arguments when using an LLM that processes untrusted content.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 21, 2026CISA-ADP
Assessed Sep 22, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/roomi-fields/notebooklm-mcp/security/advisories/GHSA-jjhp-8crj-mppq | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
| CWE-73 | External Control of File Name or Path | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| roomi-fields NotebookLM MCP | >= 1.6.0, < 2.0.3 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 22, 2026 | CVE Modified | CISA-ADP |
| Sep 21, 2026 | New CVE Received | [email protected] |