{"action":"Upgrade jupyterhub to 5.4.4 or later.","affected":[{"fixed":"5.4.4","introduced":"0"}],"component":"jupyterhub","cve_ids":["CVE-2026-33709"],"ecosystem":"PyPI","epss":0.00206,"exploited":false,"fixed_versions":["5.4.4"],"ghsa_id":"GHSA-3vff-hjqv-m7h8","id":"tcs_01M5KEWHXPQ69VR8ZEK4F9JDZV","modified_at":"2026-07-13T07:26:28.413653255Z","published_at":"2026-04-03T21:36:07Z","references":["https://osv.dev/vulnerability/GHSA-3vff-hjqv-m7h8","https://github.com/jupyterhub/jupyterhub/security/advisories/GHSA-3vff-hjqv-m7h8","https://nvd.nist.gov/vuln/detail/CVE-2026-33709","https://github.com/jupyterhub/jupyterhub","https://github.com/jupyterhub/jupyterhub/releases/tag/5.4.4"],"severity":{"label":"medium","score":6.1},"sources":[{"source":"osv","source_id":"GHSA-3vff-hjqv-m7h8","url":"https://osv.dev/vulnerability/GHSA-3vff-hjqv-m7h8"}],"summary":"JupyterHub has an Open Redirect Vulnerability"}