{"action":"Upgrade jupyter-server to 2.18.0 or later.","affected":[{"fixed":"2.18.0","introduced":"0"}],"component":"jupyter-server","cve_ids":["CVE-2026-40934"],"ecosystem":"PyPI","epss":0.00332,"exploited":false,"fixed_versions":["2.18.0"],"ghsa_id":"GHSA-5mrq-x3x5-8v8f","id":"tcs_01M5KHCXW9DP5WA0TNM25NDNWY","modified_at":"2026-05-20T09:19:02.981614Z","published_at":"2026-05-05T22:16:00.820Z","references":["https://osv.dev/vulnerability/PYSEC-2026-69","https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-5mrq-x3x5-8v8f"],"severity":{"label":"medium","score":6.8},"sources":[{"source":"osv","source_id":"PYSEC-2026-69","url":"https://osv.dev/vulnerability/PYSEC-2026-69"}],"summary":"Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, the secret used to sign authentication cookies is persisted to a static file at ~/.local/share/jupyter/runti"}