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CVE-2025-24294

Medium priority

Some fixes available 10 of 19

The attack vector is a potential Denial of Service (DoS). The vulnerability is caused by an insufficient check on the length of a decompressed domain name within a DNS packet. An attacker can craft a malicious DNS packet...

8 affected packages

ruby2.3, ruby2.5, ruby2.7, ruby3.0, ruby3.2...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ruby2.3 Not in release Not in release Not in release
ruby2.5 Not in release Not in release Not in release Fixed
ruby2.7 Not in release Not in release Not in release Fixed
ruby3.0 Not in release Not in release Fixed
ruby3.2 Not in release Fixed Not in release
ruby3.3 Fixed Not in release Not in release
jruby Needs evaluation Needs evaluation Not in release Needs evaluation Needs evaluation
rubygems Fixed Not affected Not affected
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CVE-2025-6442

Medium priority

Some fixes available 8 of 13

Ruby WEBrick read_header HTTP Request Smuggling Vulnerability. This vulnerability allows remote attackers to smuggle arbitrary HTTP requests on affected installations of Ruby WEBrick. This issue is exploitable when the product is...

5 affected packages

ruby-webrick, jruby, ruby2.3, ruby2.5, ruby2.7

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ruby-webrick Fixed Fixed Fixed
jruby Not affected Not affected Not in release Vulnerable Vulnerable
ruby2.3 Not in release Not in release Not in release
ruby2.5 Not in release Not in release Not in release Fixed
ruby2.7 Not in release Not in release Not in release Fixed
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CVE-2025-43857

Low priority
Needs evaluation

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.5.7, 0.4.20, 0.3.9, and 0.2.5, there is a possibility for denial of service by memory exhaustion when net-imap reads...

7 affected packages

ruby2.3, ruby2.5, ruby2.7, ruby3.0, ruby3.2...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ruby2.3 Not in release Not in release Not in release Not in release
ruby2.5 Not in release Not in release Not in release Not in release Needs evaluation
ruby2.7 Not in release Not in release Not in release Ignored
ruby3.0 Not in release Not in release Needs evaluation Not in release
ruby3.2 Not in release Needs evaluation Not in release Not in release
ruby3.3 Needs evaluation Not in release Not in release Not in release
jruby Needs evaluation Needs evaluation Not in release Ignored Needs evaluation
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CVE-2025-27221

Medium priority

Some fixes available 9 of 17

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.

7 affected packages

ruby2.3, ruby2.5, ruby2.7, ruby3.0, ruby3.2...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ruby2.3 Not in release Not in release Not in release Not in release
ruby2.5 Not in release Not in release Not in release Not in release Fixed
ruby2.7 Not in release Not in release Not in release Fixed
ruby3.0 Not in release Not in release Fixed Not in release
ruby3.2 Not in release Fixed Not in release Not in release
ruby3.3 Fixed Not in release Not in release Not in release
jruby Needs evaluation Needs evaluation Not in release Ignored Needs evaluation
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CVE-2025-27220

Medium priority

Some fixes available 9 of 17

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

7 affected packages

jruby, ruby2.3, ruby2.5, ruby2.7, ruby3.0...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
jruby Needs evaluation Needs evaluation Not in release Ignored Needs evaluation
ruby2.3 Not in release Not in release Not in release Not in release
ruby2.5 Not in release Not in release Not in release Not in release Fixed
ruby2.7 Not in release Not in release Not in release Fixed
ruby3.0 Not in release Not in release Fixed Not in release
ruby3.2 Not in release Fixed Not in release Not in release
ruby3.3 Fixed Not in release Not in release Not in release
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CVE-2025-27219

Medium priority

Some fixes available 9 of 17

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...

7 affected packages

ruby2.3, ruby2.5, ruby2.7, ruby3.0, ruby3.2...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ruby2.3 Not in release Not in release Not in release Not in release
ruby2.5 Not in release Not in release Not in release Not in release Fixed
ruby2.7 Not in release Not in release Not in release Fixed
ruby3.0 Not in release Not in release Fixed Not in release
ruby3.2 Not in release Fixed Not in release Not in release
ruby3.3 Fixed Not in release Not in release Not in release
jruby Needs evaluation Needs evaluation Not in release Ignored Needs evaluation
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CVE-2025-25186

Low priority
Fixed

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Starting in version 0.3.2 and prior to versions 0.3.8, 0.4.19, and 0.5.6, there is a possibility for denial of service by memory exhaustion...

6 affected packages

ruby2.3, ruby2.5, ruby2.7, ruby3.0, ruby3.2, ruby3.3

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ruby2.3 Not in release Not in release Not in release
ruby2.5 Not in release Not in release Not in release Not affected
ruby2.7 Not in release Not in release Not affected
ruby3.0 Not in release Not affected Not in release
ruby3.2 Fixed Not in release Not in release
ruby3.3 Not in release Not in release Not in release
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CVE-2025-0306

Medium priority
Not affected

A vulnerability was found in Ruby. The Ruby interpreter is vulnerable to the Marvin Attack. This attack allows the attacker to decrypt previously encrypted messages or forge signatures by exchanging a large number of messages with...

6 affected packages

ruby3.0, ruby2.3, ruby2.5, ruby2.7, ruby3.2, ruby3.3

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ruby3.0 Not in release Not affected Not in release
ruby2.3 Not in release Not in release Not in release
ruby2.5 Not in release Not in release Not in release Not affected
ruby2.7 Not in release Not in release Not affected
ruby3.2 Not affected Not in release Not in release
ruby3.3 Not in release Not in release Not in release
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CVE-2024-49761

Medium priority

Some fixes available 8 of 9

REXML is an XML toolkit for Ruby. The REXML gem before 3.3.9 has a ReDoS vulnerability when it parses an XML that has many digits between &# and x...; in a hex numeric character reference (&#x...;). This does not happen with Ruby...

7 affected packages

jruby, ruby2.3, ruby2.5, ruby2.7, ruby3.0...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
jruby Not affected Not in release Not affected Not affected
ruby2.3 Not in release Not in release Not in release
ruby2.5 Not in release Not in release Not in release Fixed
ruby2.7 Not in release Not in release Fixed
ruby3.0 Not in release Fixed Not in release
ruby3.2 Fixed Not in release Not in release
ruby3.3 Not in release Not in release Not in release
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CVE-2024-47220

Medium priority

Some fixes available 9 of 13

An issue was discovered in the WEBrick toolkit through 1.8.1 for Ruby. It allows HTTP request smuggling by providing both a Content-Length header and a Transfer-Encoding header, e.g., "GET /admin HTTP/1.1\r\n" inside of a "POST...

5 affected packages

ruby-webrick, jruby, ruby2.3, ruby2.5, ruby2.7

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ruby-webrick Fixed Fixed Fixed Not in release
jruby Not affected Not affected Not in release Vulnerable Vulnerable
ruby2.3 Not in release Not in release Not in release
ruby2.5 Not in release Not in release Not in release Fixed
ruby2.7 Not in release Not in release Not in release Fixed
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