Description
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: 2022-02-11
Score: 8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-3023-1 puma security update
Debian DLA Debian DLA DLA-3083-1 puma security update
Debian DSA Debian DSA DSA-5146-1 puma security update
EUVD EUVD EUVD-2022-1175 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.
Github GHSA Github GHSA GHSA-rmj8-8hhh-gv5h Puma used with Rails may lead to Information Exposure
Ubuntu USN Ubuntu USN USN-6682-1 Puma vulnerabilities
History

Sun, 13 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00285}

epss

{'score': 0.00309}


Subscriptions

Debian Debian Linux
Fedoraproject Fedora
Puma Puma
Redhat Satellite
Rubyonrails Rails
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-04-23T19:05:33.266Z

Reserved: 2022-01-19T00:00:00.000Z

Link: CVE-2022-23634

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2022-02-11T22:15:07.817

Modified: 2024-11-21T06:48:58.950

Link: CVE-2022-23634

cve-icon Redhat

Severity : Important

Publid Date: 2022-02-11T00:00:00Z

Links: CVE-2022-23634 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses