{"action":"Upgrade marimo to 0.23.0 or later.","affected":[{"fixed":"0.23.0","introduced":"0"}],"component":"marimo","cve_ids":["CVE-2026-39987"],"ecosystem":"PyPI","epss":0.99564,"exploited":true,"fixed_versions":["0.23.0"],"ghsa_id":"GHSA-2679-6mx9-h9xc","id":"tcs_01M5KERX10ZENZNKMFKV5RMVQB","modified_at":"2026-06-29T12:26:12.729455405Z","published_at":"2026-04-08T21:50:58Z","references":["https://osv.dev/vulnerability/GHSA-2679-6mx9-h9xc","https://github.com/marimo-team/marimo/security/advisories/GHSA-2679-6mx9-h9xc","https://nvd.nist.gov/vuln/detail/CVE-2026-39987","https://github.com/marimo-team/marimo/pull/9098","https://github.com/marimo-team/marimo/commit/c24d4806398f30be6b12acd6c60d1d7c68cfd12a","https://github.com/marimo-team/marimo","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-39987","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-39987","https://www.sysdig.com/blog/marimo-oss-python-notebook-rce-from-disclosure-to-exploitation-in-under-10-hours"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"GHSA-2679-6mx9-h9xc","url":"https://osv.dev/vulnerability/GHSA-2679-6mx9-h9xc"},{"source":"kev","source_id":"CVE-2026-39987","url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json"}],"summary":"Marimo: Pre-Auth Remote Code Execution via Terminal WebSocket Authentication Bypass"}