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CVE-2025-27219

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Date: March 2, 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.

Severity Score

Related Resources (11)

https://nvd.nist.gov/vuln/detail/CVE-2025-27219
https://github.com/ruby/cgi/pull/54
https://github.com/ruby/cgi/pull/53
https://github.com/ruby/cgi/pull/52
https://security.alpinelinux.org/vuln/CVE-2025-27219
https://github.com/ruby/cgi
https://hackerone.com/reports/2936778
https://security-tracker.debian.org/tracker/CVE-2025-27219
https://www.cve.org/CVERecord?id=CVE-2025-27219
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27219.yml
https://www.mend.io/vulnerability-database/CVE-2025-27219

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption

CWE-400

Allocation of Resources Without Limits or Throttling

CWE-770

Top Fix

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Upgrade to version cgi - 0.3.5.1;cgi - 0.3.7;cgi - 0.4.2

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

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