Summary
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):
* rexml: DoS vulnerability in REXML (CVE-2024-39908)
* rexml: rubygem-rexml: DoS when parsing an XML having many specific characters such as whitespace character, >] and ]> (CVE-2024-41123)
* rexml: DoS vulnerability in REXML (CVE-2024-41946)
* rexml: DoS vulnerability in REXML (CVE-2024-43398)
* CGI: ReDoS in CGI::Util#escapeElement (CVE-2025-27220)
* 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.
Fixed packages 4
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 9 | rubygem-mysql2 | 0.5.4-1.module_el9.1.0+8+503f6fbd |
| AlmaLinux · 9 | rubygem-mysql2-doc | 0.5.4-1.module_el9.1.0+8+503f6fbd |
| AlmaLinux · 9 | rubygem-pg | 1.3.5-1.module_el9.1.0+8+503f6fbd |
| AlmaLinux · 9 | rubygem-pg-doc | 1.3.5-1.module_el9.1.0+8+503f6fbd |
Vulnerabilities 7
-
Medium 5.9
REXML denial of service vulnerability
REXML is an XML toolkit for Ruby. The REXML gem before 3.3.6 has a DoS vulnerability when it parses an XML that has many deep elements that have same local name attributes. If you need to parse untrusted XMLs with tree parser API like REXML::Document.new, you…
-
Medium 5.8
CGI has Denial of Service (DoS) potential in Cookie.parse
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 …
-
Medium 5.3
REXML DoS vulnerability
REXML is an XML toolkit for Ruby. The REXML gem before 3.3.2 has some DoS vulnerabilities when it parses an XML that has many specific characters such as whitespace character, `>]` and `]>`. The REXML gem 3.3.3 or later include the patches to fix these vulner…
-
Medium 5.3
REXML DoS vulnerability
REXML is an XML toolkit for Ruby. The REXML gem 3.3.2 has a DoS vulnerability when it parses an XML that has many entity expansions with SAX2 or pull parser API. The REXML gem 3.3.3 or later include the patch to fix the vulnerability.
-
Medium 4.3CVE-2024-39908 Public exploit
Denial of service in REXML
REXML is an XML toolkit for Ruby. The REXML gem before 3.3.1 has some DoS vulnerabilities when it parses an XML that has many specific characters such as `<`, `0` and `%>`. If you need to parse untrusted XMLs, you many be impacted to these vulnerabilities. Th…
-
Medium 4.0
CGI has Regular Expression Denial of Service (ReDoS) potential in Util#escapeElement
In the CGI gem before 0.4.2 for Ruby, a Regular Expression Denial of Service (ReDoS) vulnerability exists in the Util#escapeElement method.
-
Low 3.2
URI allows for userinfo Leakage in URI#join, URI#merge, and URI#+
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.
References
-
report
https://access.redhat.com/security/cve/CVE-2024-39908
-
report
https://access.redhat.com/security/cve/CVE-2024-41123
-
report
https://access.redhat.com/security/cve/CVE-2024-41946
-
report
https://access.redhat.com/security/cve/CVE-2024-43398
-
report
https://access.redhat.com/security/cve/CVE-2025-27219
-
report
https://access.redhat.com/security/cve/CVE-2025-27220
-
report
https://access.redhat.com/security/cve/CVE-2025-27221
-
report
https://bugzilla.redhat.com/2298243
-
report
https://bugzilla.redhat.com/2302268
-
report
https://bugzilla.redhat.com/2302272
-
report
https://bugzilla.redhat.com/2307297
-
report
https://bugzilla.redhat.com/2349696
-
report
https://bugzilla.redhat.com/2349699
-
report
https://bugzilla.redhat.com/2349700
-
advisory
https://errata.almalinux.org/9/ALSA-2025-4488.html