Medium severity6.1NVD Advisory· Published Apr 3, 2026· Updated Apr 22, 2026
CVE-2026-33709
CVE-2026-33709
Description
JupyterHub is software that allows one to create a multi-user server for Jupyter notebooks. Prior to version 5.4.4, an open redirect vulnerability in JupyterHub allows attackers to construct links which, when clicked, take users to the JupyterHub login page, after which they are sent to an arbitrary attacker-controlled site outside JupyterHub instead of a JupyterHub page, bypassing JupyterHub's check to prevent this. This issue has been patched in version 5.4.4.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
jupyterhubPyPI | < 5.4.4 | 5.4.4 |
Affected products
3- osv-coords2 versions
< 5.4.4+ 1 more
- (no CPE)range: < 5.4.4
- (no CPE)range: < 5.4.4
Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-3vff-hjqv-m7h8ghsaADVISORY
- github.com/jupyterhub/jupyterhub/security/advisories/GHSA-3vff-hjqv-m7h8nvdMitigationVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-33709ghsaADVISORY
- github.com/jupyterhub/jupyterhub/releases/tag/5.4.4nvdProductWEB
News mentions
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