CVE-2024-35178 Jupyter server on Windows discloses Windows user password hash
Unauthenticated attackers can leak Windows NTLMv2 password hashes from Jupyter Server, enabling credential cracking or relay attacks to compromise the host or network.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-35178?
CVE-2024-35178 is a high-severity vulnerability in jupyter-server jupyter_server, published on 6 Jun 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Jupyter Server provides the backend for Jupyter web applications. 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 vulnerability is fixed in 2.14.1.
Weakness: CWE-200
Which versions are affected by CVE-2024-35178?
3 open source packages ship an affected version, including jupyter-server and jupyter_server. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
jupyter-server PyPI | All versions | 2.14.1 |
jupyter-server PyPI | All versions | 2.14.1 |
jupyter_server PyPI | All versions | 2.14.1 |
Products include Jupyter Jupyter Server.
How do I fix CVE-2024-35178?
Upgrade jupyter-server to 2.14.1 or later.
Is CVE-2024-35178 being exploited?
There is no known exploitation of CVE-2024-35178 in the wild and no public exploit code.
Other vulnerabilities in jupyter-server jupyter_server
- CVE-2026-44727 Jupyter Server: Stored XSS in `NbconvertFileHandler` / `NbconvertPostHandler` via missing `sandbox` CSP
- CVE-2026-35397 jupyter-server path traversal allows access to sibling directories sharing root_dir name prefix
- CVE-2026-40110 jupyter-server CORS origin validation bypass via unanchored regex in allow_origin_pat
- CVE-2026-40934 jupyter-server authentication cookies remain valid after password reset due to static cookie secret
- CVE-2022-24757 Sensitive Auth & Cookie data stored in Jupyter server logs
Sources
Also known as GHSA-hrw6-wg82-cm62, OESA-2024-2308, PYSEC-2024-165, UBUNTU-CVE-2024-35178.