{"id":"CVE-2021-23339","aliases":["GHSA-2w7w-2j92-44hx","SNYK-JAVA-COMTYPESAFEAKKA-1075043"],"url":"https://o3.security/vulnerability/CVE-2021-23339","summary":"HTTP Request Smuggling in akka-http-core","details":"This affects all versions before 10.1.14 and from 10.2.0 to 10.2.4 of package com.typesafe.akka:akka-http-core. It allows multiple Transfer-Encoding headers.","published":"2021-02-17T08:15:11.330Z","modified":"2026-07-09T12:33:11.768043Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Maven","name":"com.typesafe.akka:akka-http-core","fixedVersion":"10.2.4"},{"ecosystem":"Maven","name":"com.typesafe.akka:akka-http-core","fixedVersion":"10.1.14"}],"fix":{"url":"https://github.com/akka/akka-http/pull/3754%23issuecomment-779265201","label":"akka/akka-http#3754"},"references":[{"type":"ADVISORY","url":"https://snyk.io/vuln/SNYK-JAVA-COMTYPESAFEAKKA-1075043"},{"type":"FIX","url":"https://github.com/akka/akka-http/pull/3754%23issuecomment-779265201"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T12:33:11.768043Z"}}