{"action":"Upgrade jupyterhub to 1.5.0 or later.","affected":[{"fixed":"1.5.0","introduced":"1.0.0"}],"component":"jupyterhub","cve_ids":["CVE-2021-41247"],"ecosystem":"PyPI","epss":0.00804,"exploited":false,"fixed_versions":["1.5.0"],"ghsa_id":"GHSA-cw7p-q79f-m2v7","id":"tcs_01M5KFDX0479KM97835RJSSN2C","modified_at":"2026-07-08T06:28:53.199283056Z","published_at":"2021-11-08T18:02:37Z","references":["https://osv.dev/vulnerability/GHSA-cw7p-q79f-m2v7","https://github.com/jupyterhub/jupyterhub/security/advisories/GHSA-cw7p-q79f-m2v7","https://nvd.nist.gov/vuln/detail/CVE-2021-41247","https://github.com/jupyterhub/jupyterhub/commit/5ac9e7f73a6e1020ffddc40321fc53336829fe27","https://github.com/jupyterhub/jupyterhub","https://github.com/pypa/advisory-database/tree/main/vulns/jupyterhub/PYSEC-2021-386.yaml"],"severity":{"label":"low","score":3.5},"sources":[{"source":"osv","source_id":"GHSA-cw7p-q79f-m2v7","url":"https://osv.dev/vulnerability/GHSA-cw7p-q79f-m2v7"}],"summary":"incomplete JupyterHub logout with simultaneous JupyterLab sessions"}