{"action":"Upgrade org.http4k:http4k-core to 4.51.0.0 (4.x), 5.42.0.0 (5.x) or 6.49.0.0 (6.x) or later.","affected":[{"fixed":"6.49.0.0","introduced":"6.0.0.0"},{"fixed":"5.42.0.0","introduced":"5.0.0.0"},{"fixed":"4.51.0.0","introduced":"0"}],"component":"org.http4k:http4k-core","cve_ids":["CVE-2026-100724"],"ecosystem":"Maven","epss":0.00344,"exploited":false,"fixed_versions":["6.49.0.0","5.42.0.0","4.51.0.0"],"ghsa_id":"GHSA-jrpc-7vxp-69p6","id":"tcs_01M5N93M3RCTBYVNKZZPVS61JK","modified_at":"2026-09-27T11:56:07.608749487Z","published_at":"2026-06-19T21:15:59Z","references":["https://osv.dev/vulnerability/GHSA-jrpc-7vxp-69p6","https://github.com/http4k/http4k/security/advisories/GHSA-jrpc-7vxp-69p6","https://github.com/http4k/http4k/commit/0121b05537","https://github.com/http4k/http4k/commit/54c6385615","https://github.com/http4k/http4k","https://github.com/http4k/http4k/releases/tag/6.49.0.0"],"severity":{"label":"medium","score":5.4},"sources":[{"source":"osv","source_id":"GHSA-jrpc-7vxp-69p6","url":"https://osv.dev/vulnerability/GHSA-jrpc-7vxp-69p6"},{"source":"nvd","source_id":"CVE-2026-100724","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100724"}],"summary":"http4k: `reverseProxy()` defaulted to substring (`Contains`) matching on `Host`; tightened to `Exact`"}