CVE-2022-23634

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.

• CWE-200
• CWE-404

• https://github.com/advisories/GHSA-rmj8-8hhh-gv5hThird Party Advisory
• https://github.com/advisories/GHSA-wh98-p28r-vrc9Mitigation, Not Applicable, Third Party Advisory
• https://github.com/puma/puma/commit/b70f451fe8abc0cff192c065d549778452e155bbPatch, Third Party Advisory
• https://github.com/puma/puma/security/advisories/GHSA-rmj8-8hhh-gv5hPatch, Third Party Advisory
• https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1Mailing List, Mitigation, Patch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/05/msg00034.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/08/msg00015.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F6YWGIIKL7KKTS3ZOAYMYPC7D6WQ5OA5/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7NESIBFCNSR3XH7LXDPKVMSUBNUB43G/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUBFJ44NCKJ34LECZRAP4N5VL6USJSIB/
• https://security.gentoo.org/glsa/202208-28Third Party Advisory
• https://www.debian.org/security/2022/dsa-5146Third Party Advisory
• https://github.com/advisories/GHSA-rmj8-8hhh-gv5hThird Party Advisory
• https://github.com/advisories/GHSA-wh98-p28r-vrc9Mitigation, Not Applicable, Third Party Advisory
• https://github.com/puma/puma/commit/b70f451fe8abc0cff192c065d549778452e155bbPatch, Third Party Advisory
• https://github.com/puma/puma/security/advisories/GHSA-rmj8-8hhh-gv5hPatch, Third Party Advisory
• https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1Mailing List, Mitigation, Patch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/05/msg00034.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/08/msg00015.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F6YWGIIKL7KKTS3ZOAYMYPC7D6WQ5OA5/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7NESIBFCNSR3XH7LXDPKVMSUBNUB43G/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUBFJ44NCKJ34LECZRAP4N5VL6USJSIB/
• https://security.gentoo.org/glsa/202208-28Third Party Advisory
• https://www.debian.org/security/2022/dsa-5146Third Party Advisory

Published

Feb 11, 2022

Last Modified

Jun 17, 2026

Status

Modified

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