{"action":"Upgrade hyper to 0.12.36 or later.","affected":[{"fixed":"0.14.3","introduced":"0.14.0"},{"fixed":"0.13.10","introduced":"0.13.0"},{"fixed":"0.12.36","introduced":"0.12.0"}],"component":"hyper","cve_ids":["CVE-2021-21299"],"ecosystem":"crates.io","epss":0.04732,"exploited":false,"fixed_versions":["0.14.3","0.13.10","0.12.36"],"ghsa_id":"GHSA-6hfq-h8hq-87mf","id":"tcs_01M5KETPY4ZYJDGWNBM2HD7QB3","modified_at":"2026-07-08T06:28:31.977759336Z","published_at":"2021-08-25T20:56:18Z","references":["https://osv.dev/vulnerability/GHSA-6hfq-h8hq-87mf","https://github.com/hyperium/hyper/security/advisories/GHSA-6hfq-h8hq-87mf","https://nvd.nist.gov/vuln/detail/CVE-2021-21299","https://github.com/hyperium/hyper/commit/8f93123efef5c1361086688fe4f34c83c89cec02","https://github.com/hyperium/hyper","https://portswigger.net/research/http-desync-attacks-request-smuggling-reborn","https://rustsec.org/advisories/RUSTSEC-2021-0020.html"],"severity":{"label":"medium","score":4.8},"sources":[{"source":"osv","source_id":"GHSA-6hfq-h8hq-87mf","url":"https://osv.dev/vulnerability/GHSA-6hfq-h8hq-87mf"}],"summary":"HTTP Request Smuggling in hyper"}