CVE-2025-27219

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.

Category

5.8
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.16%
Third-Party Advisory github.com
Affected: ruby-lang CGI
Published at:
Updated at:

References

Link Tags
https://hackerone.com/reports/2936778 permissions required
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27219.yml third party advisory

Frequently Asked Questions

What is the severity of CVE-2025-27219?
CVE-2025-27219 has been scored as a medium severity vulnerability.
How to fix CVE-2025-27219?
To fix CVE-2025-27219, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-27219 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-27219 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-27219?
CVE-2025-27219 affects ruby-lang CGI.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.