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CVE-2026-33175

CVE-2026-33175 · OAuthenticator: Authentication Bypass in Auth0OAuthenticator via Unverified Email Claims

This page contains facts from public vulnerability sources. Check the original advisory before updating.

OAuthenticator is software that allows OAuth2 identity providers to be plugged in and used with JupyterHub. Prior to version 17.4.0, an authentication bypass vulnerability in oauthenticator allows an attacker with an unverified email address on an Auth0 tenant to login to JupyterHub. When email is used as the usrname_claim, this gives users control over their username and the possibility of account takeover. This issue has been patched in version 17.4.0.

CVSS 8.8 · High · EPSS 0.4% · Fix available

Published
Updated

Stack: python

Affected products and versions

  • oauthenticator

    Versions
    • < 17.4.0: Affected

    No fix published

  • oauthenticator PyPI

    Versions
    • 0.1.0
    • 0.10.0
    • 0.11.0
    • 0.12.0
    • 0.12.1
    • 0.12.2
    • 0.12.3
    • 0.13.0
    • 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
    • 14.0.0
    • 14.1.0
    • 14.2.0
    • 15.0.0
    • 15.0.1
    • 15.1.0
    • 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
    • 16.3.0
    • 16.3.1
    • 17.0.0
    • 17.1.0
    • 17.2.0
    • 17.3.0
    Affected ranges
    • ECOSYSTEM: < 17.4.0

    Update to 17.4.0

Original sources

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