{"action":"Upgrade 9router to 0.4.37 or later.","affected":[{"fixed":"0.4.37","introduced":"0.4.30"}],"component":"9router","cve_ids":["CVE-2026-46339"],"ecosystem":"npm","epss":0.02762,"exploited":false,"fixed_versions":["0.4.37"],"ghsa_id":"GHSA-fhh6-4qxv-rpqj","id":"tcs_01M5KFNKHYKCTAAEH42M5YRDS5","modified_at":"2026-05-19T19:41:27.045250Z","published_at":"2026-05-19T19:22:05Z","references":["https://osv.dev/vulnerability/GHSA-fhh6-4qxv-rpqj","https://github.com/decolua/9router/security/advisories/GHSA-fhh6-4qxv-rpqj","https://github.com/decolua/9router"],"severity":{"label":"critical","score":10},"sources":[{"source":"osv","source_id":"GHSA-fhh6-4qxv-rpqj","url":"https://osv.dev/vulnerability/GHSA-fhh6-4qxv-rpqj"}],"summary":"9router: Unauthenticated Remote Code Execution via unprotected MCP custom plugin routes"}