CVE-2026-108752

JupyterHub through 6.0.1 OAuth Client ID Collision via Unescaped Hyphen

Published Oct 11, 2026 CVSS 4.0 · 2.3 Low EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Jupyterhub
Jupyterhub jupyterhub
Vendors & Products Jupyterhub
Jupyterhub jupyterhub
Type Values Removed Values Added
Description 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.
Title JupyterHub through 6.0.1 OAuth Client ID Collision via Unescaped Hyphen
First Time appeared Jupyter
Jupyter jupyterhub
Weaknesses CWE-694
CPEs cpe:2.3:a:jupyter:jupyterhub:*:*:*:*:*:*:*:*
Vendors & Products Jupyter
Jupyter jupyterhub
References
Metrics cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L'}

cvssV4_0

{'score': 2.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 13, 2026, 5:00 PM
Reserved
Oct 11, 2026, 1:54 AM
Status
Awaiting Analysis
Published
Oct 11, 2026, 1:17 PM
Modified
Oct 16, 2026, 5:25 PM