SB20260428213 - Open redirect in jupyterhub
Published: April 28, 2026
Security Bulletin ID
SB20260428213
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Open redirect (CVE-ID: CVE-2026-33709)
CWE-ID: CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to redirect users to an arbitrary attacker-controlled site.
The vulnerability exists due to url redirection to an untrusted site in the JupyterHub login redirect handling when processing crafted links. A remote attacker can construct a crafted link to redirect users to an arbitrary attacker-controlled site.
User interaction is required to click the crafted link.
Remediation
Install update from vendor's website.