Is CVE-2026-33175 actively exploited?

CVE-2026-33175 has no public evidence of in-the-wild exploitation as of 2026-04-15.

What is the CVSS score for CVE-2026-33175?

CVE-2026-33175 has a CVSS score of 8.8 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2026-33175?

Patch guidance is available from jupyter security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-33175.

Which products are affected by CVE-2026-33175?

1 product: jupyter oauthenticator.

Fix CVE-2026-33175 - HIGH jupyter oauthenticator

Description

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 Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-287 · Improper Authentication CWE-290

Metadata

Primary Vendor: JUPYTER
Published: 4/3/2026
Last Modified: 4/15/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-33175

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary