{"id":"CVE-2021-31402","aliases":["GHSA-9324-jv53-9cc8"],"url":"https://o3.security/vulnerability/CVE-2021-31402","summary":"dio vulnerable to CRLF injection with HTTP method string","details":"The dio package 4.0.0 for Dart allows CRLF injection if the attacker controls the HTTP method string, a different vulnerability than CVE-2020-35669.","published":"2021-04-15T19:15:12.673Z","modified":"2026-07-08T22:13:43.889765Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Pub","name":"dio","fixedVersion":"5.0.0"}],"fix":null,"references":[{"type":"REPORT","url":"https://github.com/flutterchina/dio/issues/1130"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T22:13:43.889765Z"}}