{"action":"Upgrade fast-uri to 2.4.3 or later.","affected":[{"fixed":"2.4.3","introduced":"2.3.1"},{"fixed":"3.1.4","introduced":"3.0.0"},{"fixed":"4.1.1","introduced":"4.0.0"}],"component":"fast-uri","cve_ids":["CVE-2026-16221"],"ecosystem":"npm","epss":0.00254,"exploited":false,"fixed_versions":["2.4.3","3.1.4","4.1.1"],"ghsa_id":"GHSA-v2hh-gcrm-f6hx","id":"tcs_01M5KGADE7FKJZR09Y71NDHZF0","modified_at":"2026-09-10T03:51:12.051886648Z","published_at":"2026-07-21T22:08:28Z","references":["https://osv.dev/vulnerability/GHSA-v2hh-gcrm-f6hx","https://github.com/fastify/fast-uri/security/advisories/GHSA-v2hh-gcrm-f6hx","https://nvd.nist.gov/vuln/detail/CVE-2026-16221","https://github.com/fastify/fast-uri/commit/0542a216860fd70c062a4730e620576f62ded057","https://github.com/fastify/fast-uri/commit/2d50fbabc80e4d0884fe0f6a98fe118ce6faa353","https://github.com/fastify/fast-uri/commit/9438266d6a7ded688c8bc7c4ba506da17f44a17b","https://cna.openjsf.org/security-advisories.html","https://github.com/fastify/fast-uri","https://github.com/fastify/fast-uri/releases/tag/v2.4.3","https://github.com/fastify/fast-uri/releases/tag/v3.1.4","https://github.com/fastify/fast-uri/releases/tag/v4.1.1"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-v2hh-gcrm-f6hx","url":"https://osv.dev/vulnerability/GHSA-v2hh-gcrm-f6hx"}],"summary":"fast-uri vulnerable to host confusion via literal backslash authority delimiter"}