Path Traversal on File Download
February 6, 2024
Our second vulnerability is a directory traversal inside the Datasets class within the _download_external_files method. An attacker can upload or modify a dataset containing a link pointing to a file they want to drop and the path they want to write it to on the user’s system. When a user interacts with this dataset, it triggers the download, such as when using the Dataset.squash method. The uploaded file will be written to the user’s file system at the attacker-specified location. An important note is that the external link can point to a local file by using file://, the implication being that this introduces the potential for sensitive local files to be moved to externally accessible directories.
ClearML Server
The ClearML Server is a central hub for managing projects, datasets, tasks, and more. It consists of multiple components, including an API server that users can connect to via a client to perform tasks; a web server that users can connect to via a web UI to perform tasks; a fileserver where relevant files, such as artifacts and models, are stored by default; and a MongoDB instance, that stores authentication information, among other items.
Related SAI Security Advisory
June 12, 2026
Post-Authentication RCE via update_collection
Any authenticated user with UPDATE_COLLECTION permission can achieve remote code execution by updating a collection's embedding function to reference a malicious HuggingFace model with trust_remote_code: true. The update_collection endpoint uses the same build_from_config() code path as CVE-2026-45829. Authentication runs before model loading, so this is not a pre-authentication issue, but the model instantiation itself is unguarded.
June 12, 2026
V1 API Tenant Isolation Bypass via Null Tenant/Database Context
All V1 collection-level endpoints pass None for tenant and database to the authorization layer, making tenant-scoped access control impossible through V1, regardless of which authorization provider is configured. V1 cannot be disabled. Combined with CVE-2026-45830, any authenticated user has unrestricted read/write access to any collection by UUID through V1 endpoints.