PyPI: jupyter-server

CVE-2024-35178

Safety vulnerability ID: SFTY-20240606-35352

Safety legacy ID: pyup.io-71628

Jupyter Server on Windows has a vulnerability that lets unauthenticated attackers leak the NTLMv2 password hash of the Windows user running the Jupyter server. An attacker can crack this password to gain access to the Windows machine hosting the Jupyter server, or access other network-accessible machines or 3rd party services using that credential. Or an attacker perform an NTLM relay attack without cracking the credential to gain access to other network-accessible machines. This only affects Windows users

Created at: Nov 5, 2025Updated at: Nov 5, 2025

Overview

Jupyter server on Windows discloses Windows user password hash

Advisory

Jupyter Server on Windows has a vulnerability that lets unauthenticated attackers leak the NTLMv2 password hash of the Windows user running the Jupyter server. An attacker can crack this password to gain access to the Windows machine hosting the Jupyter server, or access other network-accessible machines or 3rd party services using that credential. Or an attacker perform an NTLM relay attack without cracking the credential to gain access to other network-accessible machines. This only affects Windows users

Affected Package

Affecting jupyter-server package, versions
<2.14.1

Also affects

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How to Fix

Upgrade
jupyter-server
to
2.14.1
or higher.

Mitigation and Workarounds

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Vulnerable Functions

Functions linked to known vulnerabilities.

Vulnerable function data is available for Enterprise customers

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Safety

Verified by Safety

Our Cybersecurity Intelligence Team reviewed this vulnerability. We combine public data with our own research to find issues not yet reported to public sources.

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