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VULNERABILITIES

CVE-2026-108752 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:4.2 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/jupyterhub/jupyterhub [email protected]
https://github.com/jupyterhub/jupyterhub/blob/3e516c6f382b481e815ec455befb2f14d80d337b/jupyterhub/oauth/provider.py#L719-L754 [email protected]
https://github.com/jupyterhub/jupyterhub/blob/3e516c6f382b481e815ec455befb2f14d80d337b/jupyterhub/user.py#L1174-L1186 [email protected]
https://github.com/jupyterhub/jupyterhub/blob/3e516c6f382b481e815ec455befb2f14d80d337b/jupyterhub/user.py#L563-L567 [email protected]
https://hackmd.io/@haind/jupyterhub-oauth-client-id-cross-user-collision [email protected]

see all 6 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-694Use of Multiple Resources with Duplicate Identifier[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-108752
NVD Published Date:
Oct 11, 2026
NVD Last Modified:
Oct 16, 2026
Source:
[email protected]
CVE-2026-108752 Details - Not Deferred