{"schema_version":"1.7.5","id":"GHSA-x7jg-6pwg-fx5h","published":"2020-05-22T14:55:05Z","modified":"2026-03-13T22:01:10.840971Z","aliases":["CVE-2020-11076"],"related":["CVE-2020-11076"],"summary":"HTTP Smuggling via Transfer-Encoding Header in Puma","details":"### Impact\n\nBy using an invalid transfer-encoding header, an attacker could [smuggle an HTTP response.](https://portswigger.net/web-security/request-smuggling)\n\nOriginally reported by @ZeddYu, who has our thanks for the detailed report.\n\n### Patches\n\nThe problem has been fixed in Puma 3.12.5 and Puma 4.3.4.\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\n* Open an issue in [Puma](https://github.com/puma/puma)\n* See our [security policy](https://github.com/puma/puma/security/policy)","affected":[{"package":{"name":"puma","ecosystem":"RubyGems","purl":"pkg:gem/puma"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.12.5"}]}],"versions":["0.8.0","0.8.1","0.8.2","0.9.0","0.9.1","0.9.2","0.9.3","0.9.4","0.9.5","1.0.0","1.1.0","1.1.1","1.2.0","1.2.1","1.2.2","1.3.0","1.3.1","1.4.0","1.5.0","1.6.0","1.6.1","1.6.2","1.6.3","2.0.0","2.0.0.b1","2.0.0.b2","2.0.0.b3","2.0.0.b4","2.0.0.b5","2.0.0.b6","2.0.0.b7","2.0.1","2.1.0","2.1.1","2.10.0","2.10.1","2.10.2","2.11.0","2.11.1","2.11.2","2.11.3","2.12.0","2.12.1","2.12.2","2.12.3","2.13.0","2.13.1","2.13.2","2.13.3","2.13.4","2.14.0","2.15.0","2.15.1","2.15.2","2.15.3","2.16.0","2.2.0","2.2.1","2.2.2","2.3.0","2.3.1","2.3.2","2.4.0","2.4.1","2.5.0","2.5.1","2.6.0","2.7.0","2.7.1","2.8.0","2.8.1","2.8.2","2.9.0","2.9.1","2.9.2","3.0.0","3.0.0.rc1","3.0.1","3.0.2","3.1.0","3.1.1","3.10.0","3.11.0","3.11.1","3.11.2","3.11.3","3.11.4","3.12.0","3.12.1","3.12.2","3.12.4","3.2.0","3.3.0","3.4.0","3.5.0","3.5.1","3.5.2","3.6.0","3.6.1","3.6.2","3.7.0","3.7.1","3.8.0","3.8.1","3.8.2","3.9.0","3.9.1"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/05/GHSA-x7jg-6pwg-fx5h/GHSA-x7jg-6pwg-fx5h.json"}},{"package":{"name":"puma","ecosystem":"RubyGems","purl":"pkg:gem/puma"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.3.4"}]}],"versions":["4.0.0","4.0.1","4.1.0","4.1.1","4.2.0","4.2.1","4.3.0","4.3.1","4.3.3"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/05/GHSA-x7jg-6pwg-fx5h/GHSA-x7jg-6pwg-fx5h.json"}}],"references":[{"type":"WEB","url":"https://github.com/puma/puma/security/advisories/GHSA-x7jg-6pwg-fx5h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-11076"},{"type":"WEB","url":"https://github.com/puma/puma/commit/f24d5521295a2152c286abb0a45a1e1e2bd275bd"},{"type":"PACKAGE","url":"https://github.com/puma/puma"},{"type":"WEB","url":"https://github.com/puma/puma/blob/master/History.md#434435-and-31253126--2020-05-22"},{"type":"WEB","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2020-11076.yml"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2020/10/msg00009.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SKIY5H67GJIGJL6SMFWFLUQQQR3EMVPR"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00034.html"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00038.html"}],"database_specific":{"cwe_ids":["CWE-444"],"github_reviewed":true,"github_reviewed_at":"2020-05-22T14:40:36Z","nvd_published_at":"2020-05-22T15:15:00Z","severity":"HIGH"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}