PyPI/jupyterhub CVE-2026-40864: medium 4.3, EPSS 0.18%
JupyterHub is software that allows users to create a multi-user server for Jupyter notebooks. In versions 4.1.0 through 5.4.4, XSRF protection (updated in 4.1.0) inappropriately treated requests with
Action: Upgrade jupyterhub to 5.4.5 or later.
pip install jupyterhub==5.4.5Affected
| introduced | fixed | last affected |
|---|---|---|
| 4.1.0 | 5.4.5 | - |
Fixed versions
| 5.4.5 |
Sources
- osv: PYSEC-2026-2189
- https://github.com/jupyterhub/jupyterhub/security/advisories/GHSA-m68r-v472-jgq9
- https://github.com/jupyterhub/jupyterhub/commit/9c5ec277d3cda5a59de2d8c8117efa77bd941127
CVE-2026-40864 · published · modified · JSON