CVE Watch22 jul 2026

CVE-2026-5422

A path traversal vulnerability exists in jupyter-server version 2.17.0 due to an incorrect root directory boundary check in the _get_os_path

CVSS

8.1

Alto

EPSS

4.9%

p92

KEV

—

Exploit Today

0-100

Publicado: 2 jun 2026 · Última mod.: 22 jul 2026 · CWE-23

EPSS · 30d

0.5%EPSS · 30 días4.9%

2026-10-172026-11-13

Descripción técnica

A path traversal vulnerability exists in jupyter-server version 2.17.0 due to an incorrect root directory boundary check in the _get_os_path() function within jupyter_server/services/contents/fileio.py. The check uses startswith(root) without appending a trailing path separator, allowing sibling directories with names starting with the same prefix as root_dir to bypass the check. Additionally, the to_os_path() function in utils.py does not strip ".." from path parts, enabling traversal sequences to bypass the vulnerable check. This vulnerability can lead to unauthorized read/write access to files in sibling directories, potentially exposing sensitive data in shared hosting environments.

Referencias oficiales

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