CVSS: 7.5EPSS: 0%CPEs: 3EXPL: 0CVE-2025-24294
https://notcve.org/view.php?id=CVE-2025-24294
12 Jul 2025 — 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 containing a highly compressed domain name. When the resolv library parses such a packet, the name decompression process consumes a large amount of CPU resources, as the library does not limit the resulting length of the name. This resource consumption can cause the application thread to be... • https://www.ruby-lang.org/en/news/2025/07/08/dos-resolv-cve-2025-24294 • CWE-400: Uncontrolled Resource Consumption •
CVSS: 6.5EPSS: 0%CPEs: 1EXPL: 0CVE-2025-6442 – Ruby WEBrick read_header HTTP Request Smuggling Vulnerability
https://notcve.org/view.php?id=CVE-2025-6442
23 Jun 2025 — 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 deployed behind an HTTP proxy that fulfills specific conditions. The specific flaw exists within the read_headers method. The issue results from the inconsistent parsing of terminators of HTTP headers. • https://github.com/ruby/webrick/commit/ee60354bcb84ec33b9245e1d1aa6e1f7e8132101#diff-ad02984d873efb089aa51551bc6b7d307a53e0ba1ac439e91d69c2e58a478864 • CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') •
CVSS: 7.5EPSS: 0%CPEs: 4EXPL: 0CVE-2025-43857 – net-imap rubygem vulnerable to possible DoS by memory exhaustion
https://notcve.org/view.php?id=CVE-2025-43857
28 Apr 2025 — 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 server responses. At any time while the client is connected, a malicious server can send can send a "literal" byte count, which is automatically read by the client's receiver thread. The response reader immediately allocates memory for the number of bytes indicated by the server resp... • https://github.com/ruby/net-imap/pull/442 • CWE-400: Uncontrolled Resource Consumption CWE-405: Asymmetric Resource Consumption (Amplification) CWE-770: Allocation of Resources Without Limits or Throttling CWE-789: Memory Allocation with Excessive Size Value •
CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 0CVE-2025-27788 – Ruby JSON Parser has Out-of-bounds Read
https://notcve.org/view.php?id=CVE-2025-27788
12 Mar 2025 — JSON is a JSON implementation for Ruby. Starting in version 2.10.0 and prior to version 2.10.2, a specially crafted document could cause an out of bound read, most likely resulting in a crash. Versions prior to 2.10.0 are not vulnerable. Version 2.10.2 fixes the problem. No known workarounds are available. • https://github.com/ruby/json/commit/c56db31f800d5d508389793e69682f99749dbadf • CWE-125: Out-of-bounds Read •
CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 0CVE-2025-27219 – CGI: Denial of Service in CGI::Cookie.parse
https://notcve.org/view.php?id=CVE-2025-27219
03 Mar 2025 — 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. A flaw was found in Ruby's CGI gem. Processing specially crafted large cookies with the CGI::Cookie.parse method can cause excessive resource consumption due to a missing limit on t... • https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27219.yml • CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 0CVE-2025-27220 – CGI: ReDoS in CGI::Util#escapeElement
https://notcve.org/view.php?id=CVE-2025-27220
03 Mar 2025 — In the CGI gem before 0.4.2 for Ruby, a Regular Expression Denial of Service (ReDoS) vulnerability exists in the Util#escapeElement method. A flaw was found in Ruby's CGI gem. The CGI::Util#escapeElement method is vulnerable to Regular expression Denial of Service (ReDoS), allowing a specially crafted input to cause a high CPU consumption. It was discovered that Ruby incorrectly handled parsing of an XML document that has specific XML characters in an attribute value using REXML gem. An attacker could use t... • https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27220.yml • CWE-1333: Inefficient Regular Expression Complexity •
CVSS: 5.3EPSS: 0%CPEs: 4EXPL: 0CVE-2025-27221 – uri: userinfo leakage in URI#join, URI#merge and URI#+
https://notcve.org/view.php?id=CVE-2025-27221
03 Mar 2025 — 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. A flaw was found in the URI ruby gem package, where userinfo leakage can occur in the uri gem. The methods URI#join, URI#merge, and URI#+ retained userinfo, such as user:password, even after the host is replaced. When generating a URL to a malicious host from a URL containing secret userinfo using thes... • https://github.com/rubysec/ruby-advisory-db/blob/master/gems/uri/CVE-2025-27221.yml • CWE-212: Improper Removal of Sensitive Information Before Storage or Transfer •
CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 0CVE-2025-25186 – Net::IMAP vulnerable to possible DoS by memory exhaustion
https://notcve.org/view.php?id=CVE-2025-25186
10 Feb 2025 — 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 in `net-imap`'s response parser. At any time while the client is connected, a malicious server can send can send highly compressed `uid-set` data which is automatically read by the client's receiver thread. The response parser uses `Range#to_a` to convert the `uid-set` data into a... • https://github.com/ruby/net-imap/commit/70e3ddd071a94e450b3238570af482c296380b35 • CWE-400: Uncontrolled Resource Consumption CWE-405: Asymmetric Resource Consumption (Amplification) CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) CWE-770: Allocation of Resources Without Limits or Throttling CWE-789: Memory Allocation with Excessive Size Value CWE-1287: Improper Validation of Specified Type of Input •
CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 0CVE-2024-49761 – REXML ReDoS vulnerability
https://notcve.org/view.php?id=CVE-2024-49761
28 Oct 2024 — 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 3.2 or later. Ruby 3.1 is the only affected maintained Ruby. The REXML gem 3.3.9 or later include the patch to fix the vulnerability. • https://github.com/ruby/rexml/commit/ce59f2eb1aeb371fe1643414f06618dbe031979f • CWE-1333: Inefficient Regular Expression Complexity •
CVSS: 7.8EPSS: 0%CPEs: 2EXPL: 0CVE-2024-47220 – WEBrick: HTTP request smuggling
https://notcve.org/view.php?id=CVE-2024-47220
22 Sep 2024 — 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 /user HTTP/1.1\r\n" request. NOTE: the supplier's position is "Webrick should not be used in production." A flaw was found in the webrick toolkit. This issue occurs because the server incorrectly handles requests with both Content-Length and Transfer-Encoding headers. • https://github.com/ruby/webrick/issues/145 • CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') •