CVE-2018-21030: Jupyter Notebook

Medium severity, CVSS 5.3. EPSS: 1.4% chance of exploitation in the next 30 days.

Jupyter Notebook before 5.5.0 does not use a CSP header to treat served files as belonging to a separate origin. Thus, for example, an XSS payload can be placed in an SVG document.

Affected products

• Jupyter Notebook: before 5.5.0 (fixed in 5.5.0)

Published 2019-10-31. Last modified 2026-06-17.