Jupyter Nbviewer vulnerabilities

1 vulnerability

Known vulnerabilities in Jupyter Nbviewer, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.

8.2CVE-2026-86258jupyternbviewer
EPSS score
0.52%
nbviewer through 1.0.1 contains a path traversal vulnerability in LocalFileHandler.can_show() that uses string-prefix comparison instead of proper path validation. Attackers can read files from sibling directories outside the configured root by requesting paths that share the root as a textual prefix, disclosing unintended notebooks and credentials.