CVE-2025-27219
Quick assessment
Affected
ruby-lang CGI
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Ruby是松本行弘（Yukihiro Matsumoto）个人开发者的一种跨平台、面向对象的动态类型编程语言。 Ruby 0.4.2之前版本存在安全漏洞，该漏洞源于CGI::Cookie.parse方法未限制原始cookie值长度，可能导致拒绝服务。
Possible ATT&CK Techniques 1 AI
T1496 · Resource Hijacking
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I. Basic Information for CVE-2025-27219
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Ruby 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ruby是松本行弘（Yukihiro Matsumoto）个人开发者的一种跨平台、面向对象的动态类型编程语言。 Ruby 0.4.2之前版本存在安全漏洞，该漏洞源于CGI::Cookie.parse方法未限制原始cookie值长度，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-27219
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2025-27219 (1)
Same Patch Batch · ruby-lang · 2025-03-03 · 3 CVEs total
| CVE-2025-27220 | 4.0 MEDIUM | Ruby 安全漏洞 |
| CVE-2025-27221 | 3.2 LOW | Ruby 安全漏洞 |
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Same product: CGI
Same weakness: CWE-770
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V. Comments for CVE-2025-27219
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