This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-108752 →
UBUNTU-CVE-2026-108752
JupyterHub through 6.0.1 contains an identifier collision vulnerability that allows authenticated users to overwrite another user's named-server OAuth...
Original description
The description as published by the source.
JupyterHub through 6.0.1 contains an identifier collision vulnerability that allows authenticated users to overwrite another user's named-server OAuth client by registering a hyphenated username. Attackers holding a name like alice-prod can overwrite the client for alice's server prod, breaking OAuth login and revoking tokens by stopping their own server.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Ubuntu:22.04:LTS
jupyterhub
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:24.04:LTS
jupyterhub
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.10
jupyterhub
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.04:LTS
jupyterhub
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- report ubuntu.com
- report cve.org
- report github.com
- report github.com
- report github.com
- report github.com
- report hackmd.io
- report vulncheck.com