CVE-2026-5422 (GCVE-0-2026-5422)

Vulnerability from cvelistv5 – Published: 2026-06-02 09:11 – Updated: 2026-06-02 12:14
VLAI
Title
Path Traversal in jupyter/jupyter
Summary
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.
Severity
6.8 (Medium)
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-02 12:13 UTC
CWE
  • CWE-23 - Relative Path Traversal
Assigner
@huntr_ai CNA under the mitre root
CNA scorecard C 65/100 over 37 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
jupyter jupyter/jupyter Affected: unspecified , ≤ latest (custom)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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