本頁列出影響 ruby-lang cgi 的已公開 CVE 漏洞（透過 NVD CPE 關聯）。每列包含嚴重程度評分、摘要與發布日期，便於識別與分析安全議題。
| CVE | 摘要 | 來源 | 最高 CVSS | EPSS % | 公開時間 | 更新時間 |
|---|---|---|---|---|---|---|
| CVE-2025-27220 | In the CGI gem before 0.4.2 for Ruby, a Regular Expression Denial of Service (ReDoS) vulnerability exists in the Util#escapeElement method. | [email protected] | 4.0 | 0.70% | 2025-03-03 | 2026-06-17 |
| 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. | [email protected] | 5.8 | 0.78% | 2025-03-03 | 2026-06-17 |
| 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 | 2.29% | 2022-11-18 | 2026-06-16 |
| 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 | 4.77% | 2022-02-06 | 2026-06-17 |
| 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 | 2.93% | 2022-01-01 | 2026-06-17 |