{"action":"Upgrade http-proxy-middleware to 2.0.10 or later.","affected":[{"fixed":"3.0.6","introduced":"3.0.0"},{"fixed":"4.1.0","introduced":"4.0.0"},{"fixed":"2.0.10","introduced":"0.16.0"}],"component":"http-proxy-middleware","cve_ids":["CVE-2026-55602"],"ecosystem":"npm","epss":0.00378,"exploited":false,"fixed_versions":["3.0.6","4.1.0","2.0.10"],"ghsa_id":"GHSA-64mm-vxmg-q3vj","id":"tcs_01M5KF5K8F0PF946708YD91W61","modified_at":"2026-09-10T03:50:48.473416745Z","published_at":"2026-06-18T13:06:11Z","references":["https://osv.dev/vulnerability/GHSA-64mm-vxmg-q3vj","https://github.com/chimurai/http-proxy-middleware/security/advisories/GHSA-64mm-vxmg-q3vj","https://github.com/chimurai/http-proxy-middleware"],"severity":{"label":"high","score":8.6},"sources":[{"source":"osv","source_id":"GHSA-64mm-vxmg-q3vj","url":"https://osv.dev/vulnerability/GHSA-64mm-vxmg-q3vj"},{"source":"nvd","source_id":"CVE-2026-55602","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55602"}],"summary":"http-proxy-middleware `router` host+path substring matching allows Host-header-driven backend routing bypass"}