CVEvulnerability

CVE-2026-5422

8.1 HIGH Published 2026-06-02 Modified 2026-07-22 Official page ↗
Status
Analyzed
Published
2026-06-02
Last modified
2026-07-22
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.1 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS 3.0 ([email protected])
6.8 MEDIUM — CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Weaknesses
CWE-23

Description

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.

Affected configurations

• jupyter jupyter server 2.17.0

Related

Weakness · CWE (1)

  • CWE-23 Relative Path Traversal weakness

References