{"id":"CVE-2022-23634","aliases":["GHSA-rmj8-8hhh-gv5h"],"url":"https://o3.security/vulnerability/CVE-2022-23634","summary":"Information Exposure when using Puma with Rails","details":"Puma is a Ruby/Rack web server built for parallelism. Prior to `puma` version `5.6.2`, `puma` may not always call `close` on the response body. Rails, prior to version `7.0.2.2`, depended on the response body being closed in order for its `CurrentAttributes` implementation to work correctly. The combination of these two behaviors (Puma not closing the body + Rails' Executor implementation) causes information leakage. This problem is fixed in Puma versions 5.6.2 and 4.3.11. This problem is fixed in Rails versions 7.02.2, 6.1.4.6, 6.0.4.6, and 5.2.6.2. Upgrading to a patched Rails _or_ Puma version fixes the vulnerability.","published":"2022-02-11T21:40:11Z","modified":"2026-08-08T03:47:27.507187705Z","cvss":{"score":8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"RubyGems","name":"puma","fixedVersion":"5.6.2"},{"ecosystem":"RubyGems","name":"puma","fixedVersion":"4.3.11"}],"fix":{"url":"https://github.com/puma/puma/commit/b70f451fe8abc0cff192c065d549778452e155bb","label":"puma/puma@b70f451"},"references":[{"type":"WEB","url":"https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/23xxx/CVE-2022-23634.json"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-rmj8-8hhh-gv5h"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-wh98-p28r-vrc9"},{"type":"ADVISORY","url":"https://github.com/puma/puma/security/advisories/GHSA-rmj8-8hhh-gv5h"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F6YWGIIKL7KKTS3ZOAYMYPC7D6WQ5OA5/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7NESIBFCNSR3XH7LXDPKVMSUBNUB43G/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUBFJ44NCKJ34LECZRAP4N5VL6USJSIB/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-23634"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202208-28"},{"type":"ADVISORY","url":"https://www.debian.org/security/2022/dsa-5146"},{"type":"FIX","url":"https://github.com/puma/puma/commit/b70f451fe8abc0cff192c065d549778452e155bb"},{"type":"ARTICLE","url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00034.html"},{"type":"ARTICLE","url":"https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-08T03:47:27.507187705Z"}}