An XSSI (cross-site inclusion) vulnerability in Jupyter Notebook before 5.7.6 allows inclusion of resources on malicious pages when visited by users who are authenticated with a Jupyter server. Access to the content of resources has been demonstrated with Internet Explorer through capturing of error messages, though not reproduced with other browsers. This occurs because Internet Explorer's error messages can include the content of any invalid JavaScript that was encountered.
Use CWE-79, Jupyter vendor hub and Notebook product page to widen CVE-2019-9644 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2021-32798, CVE-2024-43805 and CVE-2024-22421 for nearby disclosures in the same product family.