What is CVE-2025-27219?

CVE-2025-27219 is a medium-severity vulnerability in Ruby-lang Cgi, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.8/10. Published 2025-03-04.

How severe is CVE-2025-27219?

Medium severity. CVSS v3 base score is 5.8 out of 10.

Is CVE-2025-27219 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Ruby-lang Cgi

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…

EPSS: 0.008 (52.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L.

Affected products

Ruby-lang Cgi — versions 0, 0.3.6, 0.4.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

Public proof-of-concept exploits

References

cve@mitre.org (Permissions Required)
cve@mitre.org (Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2025-27219?: CVE-2025-27219 is a medium-severity vulnerability in Ruby-lang Cgi, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.8/10. Published 2025-03-04.
How severe is CVE-2025-27219?: Medium severity. CVSS v3 base score is 5.8 out of 10.
Is CVE-2025-27219 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.