Aggregates CVE and security vulnerability intelligence across all Ruby-related products, including CVSS, EPSS, publication dates, and vulnerability intelligence data.
Historical issues mainly involve vendor risk buffer overflow and vendor risk path handling and related problems; some flaws may lead to vendor impact unexpected behavior, affecting vendor surface software deployment scenarios.
| CVE | Summary | Source | Max CVSS | EPSS % | Published | Updated |
|---|---|---|---|---|---|---|
| CVE-2024-39908 | 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. The REXML gem 3.3.2 or later include the patches to fix these vulnerabilities. Users are advised to upgrade. Users unable to upgrade should avoid parsing untrusted XML strings. | [email protected] | 4.3 | 8.33% | 2024-07-16 | 2025-11-03 |
| CVE-2024-35176 | REXML is an XML toolkit for Ruby. The REXML gem before 3.2.6 has a denial of service vulnerability when it parses an XML that has many `<`s in an attribute value. Those who need to parse untrusted XMLs may be impacted to this vulnerability. The REXML gem 3.2.7 or later include the patch to fix this vulnerability. As a workaround, don't parse untrusted XMLs. | [email protected] | 5.3 | 8.43% | 2024-05-16 | 2025-11-03 |
| CVE-2023-36617 | A ReDoS issue was discovered in the URI component before 0.12.2 for Ruby. The URI parser mishandles invalid URLs that have specific characters. There is an increase in execution time for parsing strings to URI objects with rfc2396_parser.rb and rfc3986_parser.rb. NOTE: this issue exists becuse of an incomplete fix for CVE-2023-28755. Version 0.10.3 is also a fixed version. | [email protected] | 5.3 | 0.91% | 2023-06-29 | 2025-11-04 |
| CVE-2023-28756 | A ReDoS issue was discovered in the Time component through 0.2.1 in Ruby through 3.2.1. The Time parser mishandles invalid URLs that have specific characters. It causes an increase in execution time for parsing strings to Time objects. The fixed versions are 0.1.1 and 0.2.2. | [email protected] | 5.3 | 0.60% | 2023-03-31 | 2025-11-04 |
| CVE-2023-28755 | A ReDoS issue was discovered in the URI component through 0.12.0 in Ruby through 3.2.1. The URI parser mishandles invalid URLs that have specific characters. It causes an increase in execution time for parsing strings to URI objects. The fixed versions are 0.12.1, 0.11.1, 0.10.2 and 0.10.0.1. | [email protected] | 5.3 | 0.31% | 2023-03-31 | 2025-11-04 |
| CVE-2021-33621 | The cgi gem before 0.1.0.2, 0.2.x before 0.2.2, and 0.3.x before 0.3.5 for Ruby allows HTTP response splitting. This is relevant to applications that use untrusted user input either to generate an HTTP response or to create a CGI::Cookie object. | [email protected] | 8.8 | 1.10% | 2022-11-18 | 2025-11-04 |
| CVE-2016-2338 | An exploitable heap overflow vulnerability exists in the Psych::Emitter start_document function of Ruby. In Psych::Emitter start_document function heap buffer "head" allocation is made based on tags array length. Specially constructed object passed as element of tags array can increase this array size after mentioned allocation and cause heap overflow. | [email protected] | 9.8 | 13.46% | 2022-09-29 | 2024-11-21 |
| CVE-2022-28739 | There is a buffer over-read in Ruby before 2.6.10, 2.7.x before 2.7.6, 3.x before 3.0.4, and 3.1.x before 3.1.2. It occurs in String-to-Float conversion, including Kernel#Float and String#to_f. | [email protected] | 7.5 | 0.31% | 2022-05-09 | 2025-11-04 |
| CVE-2022-28738 | A double free was found in the Regexp compiler in Ruby 3.x before 3.0.4 and 3.1.x before 3.1.2. If a victim attempts to create a Regexp from untrusted user input, an attacker may be able to write to unexpected memory locations. | [email protected] | 9.8 | 0.47% | 2022-05-09 | 2024-11-21 |
| CVE-2021-41816 | CGI.escape_html in Ruby before 2.7.5 and 3.x before 3.0.3 has an integer overflow and resultant buffer overflow via a long string on platforms (such as Windows) where size_t and long have different numbers of bytes. This also affects the CGI gem before 0.3.1 for Ruby. | [email protected] | 9.8 | 0.48% | 2022-02-06 | 2024-11-21 |
| CVE-2021-41819 | CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby. | [email protected] | 7.5 | 0.76% | 2022-01-01 | 2025-05-22 |
| CVE-2021-41817 | Date.parse in the date gem through 3.2.0 for Ruby allows ReDoS (regular expression Denial of Service) via a long string. The fixed versions are 3.2.1, 3.1.2, 3.0.2, and 2.0.1. | [email protected] | 7.5 | 0.50% | 2022-01-01 | 2024-11-21 |
| CVE-2021-32066 | An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. Net::IMAP does not raise an exception when StartTLS fails with an an unknown response, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a "StartTLS stripping attack." | [email protected] | 7.4 | 0.10% | 2021-08-01 | 2024-11-21 |
| CVE-2021-31799 | In RDoc 3.11 through 6.x before 6.3.1, as distributed with Ruby through 3.0.1, it is possible to execute arbitrary code via | and tags in a filename. | [email protected] | 7.0 | 0.35% | 2021-07-30 | 2024-11-21 |
| CVE-2021-28966 | In Ruby through 3.0 on Windows, a remote attacker can submit a crafted path when a Web application handles a parameter with TmpDir. | [email protected] | 7.5 | 0.25% | 2021-07-30 | 2024-11-21 |
| CVE-2021-31810 | An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. A malicious FTP server can use the PASV response to trick Net::FTP into connecting back to a given IP address and port. This potentially makes curl extract information about services that are otherwise private and not disclosed (e.g., the attacker can conduct port scans and service banner extractions). | [email protected] | 5.8 | 0.67% | 2021-07-13 | 2024-11-21 |
| CVE-2021-28965 | The REXML gem before 3.2.5 in Ruby before 2.6.7, 2.7.x before 2.7.3, and 3.x before 3.0.1 does not properly address XML round-trip issues. An incorrect document can be produced after parsing and serializing. | [email protected] | 7.5 | 0.58% | 2021-04-21 | 2024-11-21 |
| CVE-2020-25613 | An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a simple HTTP server bundled with Ruby, had not checked the transfer-encoding header value rigorously. An attacker may potentially exploit this issue to bypass a reverse proxy (which also has a poor header check), which may lead to an HTTP Request Smuggling attack. | [email protected] | 7.5 | 0.27% | 2020-10-06 | 2024-11-21 |
| CVE-2020-10933 | An issue was discovered in Ruby 2.5.x through 2.5.7, 2.6.x through 2.6.5, and 2.7.0. If a victim calls BasicSocket#read_nonblock(requested_size, buffer, exception: false), the method resizes the buffer to fit the requested size, but no data is copied. Thus, the buffer string provides the previous value of the heap. This may expose possibly sensitive data from the interpreter. | [email protected] | 5.3 | 0.44% | 2020-05-04 | 2024-11-21 |
| CVE-2020-5247 | In Puma (RubyGem) before 4.3.2 and before 3.12.3, if an application using Puma allows untrusted input in a response header, an attacker can use newline characters (i.e. `CR`, `LF` or`/r`, `/n`) to end the header and inject malicious content, such as additional headers or an entirely new response body. This vulnerability is known as HTTP Response Splitting. While not an attack in itself, response splitting is a vector for several other attacks, such as cross-site scripting (XSS). This is related | [email protected] | 6.5 | 2.09% | 2020-02-28 | 2024-11-21 |