GHSA-x7xh-7hc7-9436:
JupyterHub vulnerability analysis and mitigation

Summary

Username validation was not applied to admin user-renames, so admins could rename users to having invalid names, leading to improper behavior.

Admins with permission to rename users could create invalid usernames, potentially leading to XSS.

Upgrade to JupyterHub 5.5.3 or 6.1.0

Source: NVD

CVE ID	Severity	Score	Technologies	Component name	CISA KEV exploit	Has fix	Published date
GHSA-hx46-2cv3-mh6g	MEDIUM	6.5	JupyterHub	jupyterhub	No	Yes	Oct 21, 2026
GHSA-x7xh-7hc7-9436	MEDIUM	6.1	JupyterHub	jupyterhub	No	Yes	Oct 21, 2026
GHSA-5jhc-4h3c-q97h	MEDIUM	4.1	JupyterHub	jupyterhub	No	Yes	Oct 21, 2026
GHSA-93gc-h923-mp36	MEDIUM	N/A	JupyterHub	jupyterhub	No	Yes	Oct 21, 2026
GHSA-r764-xgvf-jrfj	MEDIUM	N/A	JupyterHub	jupyterhub	No	Yes	Oct 21, 2026

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