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ALSA-2025:10217 — Moderate: ruby:3.3 security update

Affected: AlmaLinux:8: ruby, AlmaLinux:8: ruby-bundled-gems, AlmaLinux:8: ruby-default-gems, AlmaLinux:8: ruby-devel, AlmaLinux:8: ruby-doc, AlmaLinux:8: ruby-libs, AlmaLinux:8: rubygem-abrt, AlmaLinux:8: rubygem-abrt-doc, AlmaLinux:8: rubygem-bigdecimal, AlmaLinux:8: rubygem-bundler and 20 more

Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to perform system management tasks.

Security Fix(es):

* net-imap: Net::IMAP vulnerable to possible DoS by memory exhaustion (CVE-2025-25186) * CGI: Denial of Service in CGI::Cookie.parse (CVE-2025-27219) * uri: userinfo leakage in URI#join, URI#merge and URI#+ (CVE-2025-27221)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

bdu:2025-05128

certfr-2025-avi-0512 — De multiples vulnérabilités ont été découvertes dans les produits IBM. Certaines d'entre elles permettent à un attaquan…

certfr-2025-avi-0512

CLEANSTART-2026-JU41543 — Security fix for CVE-2025-27219 applied in: logstash-fips 9.2.4-r2

Affected: CleanStart: logstash-fips

Security vulnerability affects the logstash-fips package. This issue is resolved in later releases. See references for vulnerability details.

EUVD-2026-258265

fkie_cve-2025-27219

In the CGI gem before 0.4.2 for Ruby, the CGI::Cookie.parse method in the CGI library contains a potential Denial of Service (DoS) vulnerability. The method does not impose any limit on the length of the raw cookie value it processes. This oversight can lead to excessive resource consumption when parsing extremely large cookies.

GHSA-gh9q-2xrm-x6qv — CGI has Denial of Service (DoS) potential in Cookie.parse

Affected: RubyGems: cgi

There is a possibility for DoS by in the cgi gem. This vulnerability has been assigned the CVE identifier CVE-2025-27219. We recommend upgrading the cgi gem.

## Details

CGI::Cookie.parse took super-linear time to parse a cookie string in some cases. Feeding a maliciously crafted cookie string into the method could lead to a Denial of Service.

Please update CGI gem to version 0.3.5.1, 0.3.7, 0.4.2 or later.

## Affected versions

cgi gem versions <= 0.3.5, 0.3.6, 0.4.0 and 0.4.1.

## Credits

Thanks to lio346 for discovering this issue. Also thanks to mame for fixing this vulnerability.

msrc_CVE-2025-27219 — In the CGI gem before 0.4.2 for Ruby, the CGI::Cookie.parse method in the CGI library contains a potential Denial of Se…

msrc_CVE-2025-27219

OESA-2025-1244 — ruby security update

Affected: openEuler:20.03-LTS-SP4: ruby

Ruby is a fast and easy interpreted scripting language for object-oriented programming. It has many functions for processing text Files and perform system management tasks (such as Perl). Security Fix(es):

In the CGI gem before 0.4.2 for Ruby, a Regular Expression Denial of Service (ReDoS) vulnerability exists in the Util#escapeElement method.(CVE-2025-27220)

In the URI gem before 1.0.3 for Ruby, the URI handling methods (URI.join, URI#merge, URI#+) have an inadvertent leakage of authentication credentials because userinfo is retained even after changing the host.(CVE-2025-27221)

RHSA-2025:10217 — Red Hat Security Advisory: ruby:3.3 security update

net-imap: Net::IMAP vulnerable to possible DoS by memory exhaustion CGI: Denial of Service in CGI::Cookie.parse uri: userinfo leakage in URI#join, URI#merge and URI#+

UBUNTU-CVE-2025-27219

Affected: Ubuntu:Pro:14.04:LTS: jruby, Ubuntu:Pro:16.04:LTS: ruby2.3, Ubuntu:16.04:LTS: jruby, Ubuntu:Pro:18.04:LTS: ruby2.5, Ubuntu:18.04:LTS: jruby, Ubuntu:20.04:LTS: ruby2.7, Ubuntu:20.04:LTS: jruby, Ubuntu:22.04:LTS: ruby3.0, Ubuntu:24.04:LTS: jruby, Ubuntu:24.04:LTS: ruby3.2 and 3 more

WID-SEC-W-2025-0438 — Ruby (CGI und URI gem): Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Ruby ausnutzen, um einen Denial-of-Service-Zustand zu erzeugen und vertrauliche Informationen preiszugeben.