{"action":"Upgrade h3 to 1.15.6 or later.","affected":[{"fixed":"2.0.1-rc.15","introduced":"2.0.0"},{"fixed":"1.15.6","introduced":"0"}],"component":"h3","cve_ids":["CVE-2026-86253"],"ecosystem":"npm","epss":0.00618,"exploited":false,"fixed_versions":["2.0.1-rc.15","1.15.6"],"ghsa_id":"GHSA-wr4h-v87w-p3r7","id":"tcs_01M5KGFV0VSEHJGK02GG1Z9RV7","modified_at":"2026-09-10T03:50:41.574716361Z","published_at":"2026-03-18T16:18:32Z","references":["https://osv.dev/vulnerability/GHSA-wr4h-v87w-p3r7","https://github.com/h3js/h3/security/advisories/GHSA-wr4h-v87w-p3r7","https://github.com/h3js/h3/commit/0e751b4059060f2ade01a0bdfd96b0f5ffc8a26d","https://github.com/h3js/h3","https://github.com/h3js/h3/blob/52c82e18bb643d124b8b9ec3b1f62b081f044611/src/utils/static.ts#L86"],"severity":{"label":"medium","score":5.9},"sources":[{"source":"osv","source_id":"GHSA-wr4h-v87w-p3r7","url":"https://osv.dev/vulnerability/GHSA-wr4h-v87w-p3r7"}],"summary":"h3 has a Path Traversal via Percent-Encoded Dot Segments in serveStatic Allows Arbitrary File Read"}