{"id":"CVE-2020-25613","aliases":["BIT-ruby-2020-25613","BIT-ruby-min-2020-25613","GHSA-gwfg-cqmg-cf8f"],"url":"https://o3.security/vulnerability/CVE-2020-25613","summary":"WEBRick vulnerable to HTTP Request/Response Smuggling","details":"An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a simple HTTP server bundled with Ruby, had not checked the transfer-encoding header value rigorously. An attacker may potentially exploit this issue to bypass a reverse proxy (which also has a poor header check), which may lead to an HTTP Request Smuggling attack.","published":"2020-10-06T13:15:13.823Z","modified":"2026-10-24T10:51:22.421347064Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"RubyGems","name":"webrick","fixedVersion":"1.6.1"},{"ecosystem":"RubyGems","name":"webrick","fixedVersion":"1.5.1"},{"ecosystem":"RubyGems","name":"webrick","fixedVersion":"1.4.4"}],"fix":{"url":"https://github.com/ruby/webrick/commit/8946bb38b4d87549f0d99ed73c62c41933f97cc7","label":"ruby/webrick@8946bb3"},"references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PFP3E7KXXT3H3KA6CBZPUOGA5VPFARRJ/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTZURYROG3FFED3TYCQOBV66BS4K6WOV/"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202401-27"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210115-0008/"},{"type":"ADVISORY","url":"https://www.ruby-lang.org/en/news/2020/09/29/http-request-smuggling-cve-2020-25613/"},{"type":"REPORT","url":"https://hackerone.com/reports/965267"},{"type":"FIX","url":"https://github.com/ruby/webrick/commit/8946bb38b4d87549f0d99ed73c62c41933f97cc7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-25613"},{"type":"WEB","url":"https://github.com/ruby/webrick/commit/076ac636bf48b7a492887ce4de7041de23e6c00d"},{"type":"WEB","url":"https://github.com/ruby/webrick/commit/7618049fa57ddad2efff2a7bc7dad7d2d8a311b1"},{"type":"WEB","url":"https://github.com/ruby/webrick/commit/af2efdcdf826f25592202d187c53963e7932e4b9"},{"type":"PACKAGE","url":"https://github.com/ruby/webrick"},{"type":"WEB","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/webrick/CVE-2020-25613.yml"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PFP3E7KXXT3H3KA6CBZPUOGA5VPFARRJ"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTZURYROG3FFED3TYCQOBV66BS4K6WOV"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PFP3E7KXXT3H3KA6CBZPUOGA5VPFARRJ"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YTZURYROG3FFED3TYCQOBV66BS4K6WOV"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20210115-0008"},{"type":"WEB","url":"https://www.ruby-lang.org/en/news/2020/09/29/http-request-smuggling-cve-2020-25613"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T10:51:22.421347064Z"}}