Jupyter Server vulnerabilitiesRanked by how likely they are to be used.
Jupyter Server is made by Jupyter. We track 8 published vulnerabilities listed under that exact name, across 110 versions. None of them is on the list of flaws known to be exploited today. Jupyter lists newer releases under their own names, such as Jupyter Server Proxy, so check those pages too.
We keep watching the known-exploited list.
Is Jupyter Server listed under other names? Yes.
Jupyter also lists Jupyter Server under more specific names, such as Jupyter Server Proxy. Flaws listed only under those names are counted on their own pages, not here. If you run one of these, open its page for its own exploited flaws.
Which Jupyter Server vulnerabilities are being exploited?
This is the list that matters most: flaws criminals are using now.
None of Jupyter Server's published vulnerabilities is on the list of flaws known to be exploited today. We keep watching that list.
Which Jupyter Server flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- 1.4%CVE-2020-26275Medium
The Jupyter Server provides the backend (i.e.
- 1.3%CVE-2022-24757High
The Jupyter Server provides the backend (i.e.
- 1.0%CVE-2020-26232Medium
Jupyter Server before version 1.0.6 has an Open redirect vulnerability.
- 1.0%CVE-2022-29241High
Jupyter Server provides the backend (i.e.
- 0.8%CVE-2023-49080Medium
The Jupyter Server provides the backend (i.e.
- 0.8%CVE-2024-35178High
The Jupyter Server provides the backend for Jupyter web applications.
- 0.7%CVE-2023-39968Medium
jupyter-server is the backend for Jupyter web applications.
- 0.6%CVE-2023-40170Medium
jupyter-server is the backend for Jupyter web applications.
- 0.2%CVE-2025-61669Medium
Jupyter Server is the backend for Jupyter web applications.
Running Jupyter Server? We'll keep checking.
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1 new flaw affects software Acme tracks
The Jupyter Server provides the backend (i.e. the core services, APIs, and REST endpoints) for Jupyter web applications like Jupyter notebook, JupyterLab, and Voila. In Jupyter Server before version 1.1.1, an open redirect vulnerability could cause the jupyter server to redirect the browser to a different malicious website. All jupyter servers running without a base_url prefix are technically affected, however, these maliciously crafted links can only be reasonably made for known jupyter server hosts. A link to your jupyter server may *appear* safe, but ultimately redirect to a spoofed server on the public internet. This same vulnerability was patched in upstream notebook v5.7.8. This is fixed in jupyter_server 1.1.1. If upgrade is not available, a workaround can be to run your server on a url prefix: "jupyter server --ServerApp.base_url=/jupyter/".
- Matched to
- Jupyter Server on Acme's software list
- What to do
- Plan in the vendor’s update
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
We track 8 published vulnerabilities listed under the name Jupyter Server, across 110 versions.
None of Jupyter Server's vulnerabilities is on the list of flaws known to be exploited today.
Jupyter also lists Jupyter Server under more specific names, such as Jupyter Server Proxy. Flaws listed only under those names are counted on their own pages, not here. Open the release you run to see its own list.
Create a Precursor Intelligence account and track Jupyter Server. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.