{"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":"### Impact\nPrior 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.\n\nFrom Rails:\n\n> Under certain circumstances response bodies will not be closed, for example a bug in a webserver[1] or a bug in a Rack middleware. In the event a response is not notified of a close, ActionDispatch::Executor will not know to reset thread local state for the next request. This can lead to data being leaked to subsequent requests, especially when interacting with ActiveSupport::CurrentAttributes.\n\nThe combination of these two behaviors (Puma not closing the body + Rails' Executor implementation) causes information leakage.\n\n### Patches\nThis problem is fixed in Puma versions 5.6.2 and 4.3.11.\n\nThis problem is fixed in Rails versions 7.02.2, 6.1.4.6, 6.0.4.6, and 5.2.6.2.\n\nSee: \nhttps://github.com/advisories/GHSA-wh98-p28r-vrc9 \nfor details about the rails vulnerability\n\nUpgrading to a patched Rails _or_ Puma version fixes the vulnerability.\n\n### Workarounds\n\nUpgrade to Rails versions 7.02.2, 6.1.4.6, 6.0.4.6, and 5.2.6.2.\n\nThe [Rails CVE](https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1) includes a middleware that can be used instead.\n\n### References\n\n* Rails CVE: [CVE-2022-23633](https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1)\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [puma](https://github.com/puma/puma)\n* See our [security policy](https://github.com/puma/puma/security/policy)","published":"2022-02-11T21:40:11Z","modified":"2026-09-09T03:45:10.368242392Z","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"},{"type":"PACKAGE","url":"https://github.com/puma/puma"},{"type":"WEB","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2022-23634.yml"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F6YWGIIKL7KKTS3ZOAYMYPC7D6WQ5OA5"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L7NESIBFCNSR3XH7LXDPKVMSUBNUB43G"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TUBFJ44NCKJ34LECZRAP4N5VL6USJSIB"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-09T03:45:10.368242392Z"}}