PT-2026-30252 · Unknown · Jupyterhub

Fushuling + 1 · Published 2026-04-03 · Updated 2026-04-08 · CVE-2026-33709

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions JupyterHub versions prior to 5.4.4

Description A flaw in JupyterHub allows attackers to create links that redirect users to a JupyterHub login page, and then to an attacker-controlled site instead of a legitimate JupyterHub page. This bypasses JupyterHub's security checks.

Recommendations Upgrade to JupyterHub version 5.4.4.

Fix

Open Redirect

Weakness Enumeration

CWE-601

Related Identifiers

BIT-JUPYTERHUB-2026-33709

CVE-2026-33709

GHSA-3VFF-HJQV-M7H8

Affected Products

Jupyterhub

References · 11

• https://github.com/jupyterhub/jupyterhub/security/advisories/GHSA-3vff-hjqv-m7h8 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-33709 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-33709 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-33709 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33709 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-33709 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-jupyterhub-2026-33709 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-33709 · Security Note
• https://osv.dev/vulnerability/GHSA-3vff-hjqv-m7h8 · Vendor Advisory
• https://github.com/jupyterhub/jupyterhub · Note
• https://github.com/jupyterhub/jupyterhub/releases/tag/5.4.4 · Note