PYSEC-2026-1710

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Import Source
https://github.com/pypa/advisory-database/blob/main/vulns/oauthenticator/PYSEC-2026-1710.yaml
JSON Data
https://api.osv.dev/v1/vulns/PYSEC-2026-1710
Aliases
Published
2026-07-07T11:45:35Z
Modified
2026-07-07T17:46:29Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
GoogleOAuthenticator.hosted_domain incorrectly verifies membership of an Google organization/workspace
Details

Summary and impact

GoogleOAuthenticator.hosted_domain is used to restrict what Google accounts can be authorized to access a JupyterHub. The restriction is intended to ensure Google accounts are part of one or more Google organizations/workspaces verified to control specified domain(s).

The vulnerability is that the actual restriction has been to Google accounts with emails ending with the domain. Such accounts could have been created by anyone which at one time was able to read an email associated with the domain. This was described by Dylan Ayrey (@dxa4481) in this blog post from 15th December 2023.

Remediation

Upgrade to oauthenticator>=16.3.0 or restrict who can login another way, such as allowed_users or allowed_google_groups.

References

Affected packages

PyPI / oauthenticator

Package

Name
oauthenticator
View open source insights on deps.dev
Purl
pkg:pypi/oauthenticator

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
16.3.0

Affected versions

0.*
0.1.0
0.2.0
0.3.0
0.4.0
0.4.1
0.5.0
0.5.1
0.6.0
0.6.1
0.6.2
0.7.0
0.7.1
0.7.2
0.7.3
0.8.0
0.8.1
0.8.2
0.9.0
0.10.0
0.11.0
0.12.0
0.12.1
0.12.2
0.12.3
0.13.0
14.*
14.0.0
14.1.0
14.2.0
15.*
15.0.0
15.0.1
15.1.0
16.*
16.0.0
16.0.1
16.0.2
16.0.3
16.0.4
16.0.5
16.0.6
16.0.7
16.1.0
16.1.1
16.2.0
16.2.1

Database specific

source 
"https://github.com/pypa/advisory-database/blob/main/vulns/oauthenticator/PYSEC-2026-1710.yaml"