Insufficient Session Expiration Affecting jupyterhub package, versions <2.0.0+ds1-1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.78% (51st percentile)

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  • Snyk IDSNYK-ECHOLATEST-JUPYTERHUB-18306942
  • published25 Jul 2026
  • disclosed4 Nov 2021

Introduced: 4 Nov 2021

CVE-2021-41247  (opens in a new tab)
CWE-613  (opens in a new tab)

How to fix?

Upgrade Echo:latest jupyterhub to version 2.0.0+ds1-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream jupyterhub package and not the jupyterhub package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

JupyterHub is an open source multi-user server for Jupyter notebooks. In affected versions users who have multiple JupyterLab tabs open in the same browser session, may see incomplete logout from the single-user server, as fresh credentials (for the single-user server only, not the Hub) reinstated after logout, if another active JupyterLab session is open while the logout takes place. Upgrade to JupyterHub 1.5. For distributed deployments, it is jupyterhub in the user environment that needs patching. There are no patches necessary in the Hub environment. The only workaround is to make sure that only one JupyterLab tab is open when you log out.

CVSS Base Scores

version 3.1