High
Information Exposure when using Puma with Rails
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2022-23634
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 14:01 UTC · Revision 1
Source evidence
Information Exposure when using Puma with Rails
core-osv · Original sourcePublished 11 Feb 2022, 21:40 UTC
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.
osv:CVE-2022-23634
Complete source record
{
"id": "6d71fcecfbbd385feb6fa3d54d21f7e987598127b47364ce2a7b0687d03a7049",
"url": "https://osv.dev/vulnerability/CVE-2022-23634",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Information Exposure when using Puma with Rails",
"summary": "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.",
"evidence": "osv:CVE-2022-23634",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2022-23634",
"aliases": [
"CVE-2022-23634",
"GHSA-rmj8-8hhh-gv5h"
],
"metrics": [
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N"
}
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{
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{
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}
}
],
"versions": [
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"v4.3.3",
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-23634.json"
}
}
],
"modified": "2026-10-28T02:30:35.833625632Z",
"provider": "osv",
"references": [
"https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/23xxx/CVE-2022-23634.json",
"https://github.com/advisories/GHSA-rmj8-8hhh-gv5h",
"https://github.com/advisories/GHSA-wh98-p28r-vrc9",
"https://github.com/puma/puma/security/advisories/GHSA-rmj8-8hhh-gv5h",
"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://nvd.nist.gov/vuln/detail/CVE-2022-23634",
"https://security.gentoo.org/glsa/202208-28",
"https://www.debian.org/security/2022/dsa-5146",
"https://github.com/puma/puma/commit/b70f451fe8abc0cff192c065d549778452e155bb",
"https://lists.debian.org/debian-lts-announce/2022/05/msg00034.html",
"https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html"
],
"provider_metadata": {
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],
"cna_assigner": "GitHub_M",
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}
},
"related_cves": [
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"value": "CVE-2022-23634",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 503415,
"published_at": "2022-02-11T21:40:11+00:00"
}