Gal Zaban

**Name of the Vulnerable Software and Affected Versions** Chainlit versions prior to 2.9.4 **Description** Chainlit versions prior to 2.9.4 have an arbitrary file read issue in the /project/element update process. An authenticated client can manipulate a custom Element with a user-controlled path, leading the server to copy the specified file into the attacker’s session. The resulting element identifier (`chainlitKey`) can then be used to retrieve the file contents through the `/project/file/<chainlitKey>` API endpoint, potentially exposing any file accessible by the Chainlit service. This allows unauthorized disclosure of sensitive information like configuration files, databases, or source code. **Recommendations** Versions prior to 2.9.4 should be updated to version 2.9.4 or later.

**Name of the Vulnerable Software and Affected Versions** Chainlit versions prior to 2.9.4 **Description** Chainlit versions prior to 2.9.4 contain a server-side request forgery (SSRF) vulnerability in the `/project/element` update flow when configured with the SQLAlchemy data layer backend. An authenticated client can provide a user-controlled url value in an Element, which is fetched by the SQLAlchemy element creation logic using an outbound HTTP GET request. This allows an attacker to make arbitrary HTTP requests from the Chainlit server to internal network services or cloud metadata endpoints and store the retrieved responses via the configured storage provider. Server-Side Request Forgery (SSRF) occurs when a server fetches a remote resource without properly validating the user-supplied URL, potentially exposing internal services or sensitive data. On AWS clouds with older settings (IMDSv1), this could potentially lead to the theft of login credentials and full system takeover. **Recommendations** Versions prior to 2.9.4 should be updated to version 2.9.4 or later.