Improper Authentication Affecting py3-oauthenticator package, versions <17.4.0-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CHAINGUARDLATEST-PY3OAUTHENTICATOR-15960144
- published10 Apr 2026
- disclosed3 Apr 2026
Introduced: 3 Apr 2026
CVE-2026-33175 (opens in a new tab)How to fix?
Upgrade Chainguard py3-oauthenticator to version 17.4.0-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream py3-oauthenticator package and not the py3-oauthenticator package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
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.