{"id":"CVE-2024-37300","aliases":["GHSA-gprj-3p75-f996","PYSEC-2026-1711"],"title":"Globus `identity_provider` restriction ignored when used with `allow_all` in JupyterHub 5.0","summary":"Globus `identity_provider` restriction ignored when used with `allow_all` in JupyterHub 5.0","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","vendor":"oauthenticator","product":"oauthenticator","ecosystem":"pip","affected":["oauthenticator < 16.3.1"],"patched":["oauthenticator 16.3.1"],"published":"2024-06-12","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:50:15.608095310Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-gprj-3p75-f996","references":[{"url":"https://github.com/jupyterhub/oauthenticator/security/advisories/GHSA-gprj-3p75-f996"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-37300"},{"url":"https://github.com/jupyterhub/oauthenticator/commit/d1aea05fa89f2beae15ab0fa0b0d071030f79654"},{"url":"https://github.com/jupyterhub/oauthenticator"},{"url":"https://jupyterhub.readthedocs.io/en/stable/howto/upgrading-v5.html#authenticator-allow-all-and-allow-existing-users"}],"tags":["osv","pip"],"epss":0.00405,"epssPercentile":0.31938,"ingestedAt":"2026-07-08T18:25:49.760Z","slug":"CVE-2024-37300","body":"## Overview\n\n### Impact\n\nJupyterHub < 5.0, when used with `GlobusOAuthenticator`, could be configured to allow all users from a particular institution only. The configuration for this would look like:\n\n```python\n# Require users to be using the \"foo.horse\" identity provider, often an institution or university\nc.GlobusAuthenticator.identity_provider = \"foo.horse\"\n# Allow everyone who has that identity provider to log in\nc.GlobusAuthenticator.allow_all = True\n```\n\nThis worked fine prior to JupyterHub 5.0, because `allow_all` *did not* take precedence over `identity_provider`.\n\nSince JupyterHub 5.0, `allow_all` *does* take precedence over `identity_provider`. On a hub with the same config, now **all** users will be allowed to login, regardless of `identity_provider`. `identity_provider` will basically be ignored.\n\nThis is a [documented change](https://jupyterhub.readthedocs.io/en/stable/howto/upgrading-v5.html#authenticator-allow-all-and-allow-existing-users) in JupyterHub 5.0,\nbut is likely to catch many users by surprise.\n\n### Patches\n\nOAuthenticator 16.3.1 fixes the issue with JupyterHub 5.0, and does not affect previous versions.\n\n### Workarounds\n\nDo not upgrade to JupyterHub 5.0 when using `GlobusOAuthenticator` in the prior configuration.\n\n## Affected packages\n\n- `oauthenticator < 16.3.1`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `oauthenticator 16.3.1`","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}