CVE catalog
CVE-2026-33709
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 whi
- Severity
- Medium · CVSS 5.1
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.21% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | jupyterhub | sid | 5.2.1+ds1-5 | vulnerable |
| Debian | jupyterhub | forky | 5.2.1+ds1-5 | vulnerable |
| Debian | jupyterhub | trixie | 5.2.1+ds1-4 | vulnerable |
| Debian | jupyterhub | bookworm | 3.0.0+ds1-1 | vulnerable |
| Cpe | jupyterhub | Not reported | Not reported | vulnerable |
| Cpe | jupyterhub | Not reported | 5.4.4 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | jupyterhub | source | sid | (unfixed) | not yet assigned | Not reported | [1132715] |
| Debian | jupyterhub | source | forky | (unfixed) | not yet assigned | Not reported | [1132715] |
| Debian | jupyterhub | source | trixie | (unfixed) | not yet assigned | Not reported | [1132715] |
| Debian | jupyterhub | source | bookworm | (unfixed) | not yet assigned | Not reported | [1132715] |
| Cpe | jupyterhub | cpe | Not reported | 5.4.4 | Not reported | Not reported | Not reported |
Notes
[trixie] jupyterhub: Minor issue [bookworm] jupyterhub: Minor issue; open redirect requiring user interaction
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [jupyterhub]Affected
Details (2)
3.0.0+ds1-1· all · bookwormAffected
nvd · jupyterhub · debian · bookworm; nvd · jupyterhub · debian · 12
3.0.0+ds1-1· all · bookwormAffected
nvd · jupyterhub · debian · bookworm; nvd · jupyterhub · debian · 12
[Debian 13 (Trixie)]
- [jupyterhub]Affected
Details (2)
5.2.1+ds1-4· all · trixieAffected
nvd · jupyterhub · debian · 13
5.2.1+ds1-4· all · trixieAffected
nvd · jupyterhub · debian · 13
Observed: