CVE-2025-27219

EUVD-2025-5556
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.8 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 54%
Affected Products (NVD)
VendorProductVersion
ruby-langcgi
𝑥
< 0.3.5.1
ruby-langcgi
0.4.0 ≤
𝑥
< 0.4.2
ruby-langcgi
0.3.6
𝑥
= Vulnerable software versions
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
ruby2.3
focal
dne
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
xenial
Fixed 2.3.1-2~ubuntu16.04.16+esm10
released
ruby2.5
bionic
Fixed 2.5.1-1ubuntu1.16+esm4
released
focal
dne
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
ruby2.7
focal
Fixed 2.7.0-5ubuntu1.18
released
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
ruby3.0
focal
dne
jammy
Fixed 3.0.2-7ubuntu2.10
released
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
ruby3.2
focal
dne
jammy
dne
noble
Fixed 3.2.3-1ubuntu0.24.04.5
released
oracular
dne
plucky
dne
questing
dne
resolute
dne
ruby3.3
focal
dne
jammy
dne
noble
dne
oracular
Fixed 3.3.4-2ubuntu5.2
released
plucky
Fixed 3.3.7-1ubuntu2
released
questing
Fixed 3.3.7-1ubuntu2
released
resolute
Fixed 3.3.7-1ubuntu2
released
jruby
bionic
needs-triage
focal
needs-triage
jammy
dne
noble
needs-triage
oracular
ignored
plucky
ignored
questing
needs-triage
resolute
needs-triage
trusty
needs-triage
xenial
ignored
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
libruby2_5-2_5
suse enterprise desktop 15 SP6
2.5.9-150000.4.41.1
fixed
suse enterprise desktop 15 SP7
2.5.9-150700.24.3.1
fixed
suse enterprise sap 15 SP3
2.5.9-150000.4.41.1
fixed
suse enterprise sap 15 SP4
2.5.9-150000.4.41.1
fixed
suse enterprise sap 15 SP5
2.5.9-150000.4.41.1
fixed
suse enterprise sap 15 SP6
2.5.9-150000.4.41.1
fixed
suse enterprise sap 15 SP7
2.5.9-150700.24.3.1
fixed
suse enterprise server 15 SP2
2.5.9-150000.4.41.1
fixed
suse enterprise server 15 SP3
2.5.9-150000.4.41.1
fixed
suse enterprise server 15 SP4
2.5.9-150000.4.41.1
fixed
suse enterprise server 15 SP5
2.5.9-150000.4.41.1
fixed
suse enterprise server 15 SP6
2.5.9-150000.4.41.1
fixed
suse enterprise server 15 SP7
2.5.9-150700.24.3.1
fixed
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
ruby
RHEL 9
0:3.0.7-165.el9_5
fixed
ruby-default-gems
RHEL 9
0:3.0.7-165.el9_5
fixed
ruby-devel
RHEL 9
0:3.0.7-165.el9_5
fixed
ruby-doc
RHEL 9
0:3.0.7-165.el9_5
fixed
ruby-libs
RHEL 9
0:3.0.7-165.el9_5
fixed
rubygem-bigdecimal
RHEL 9
0:3.0.0-165.el9_5
fixed
rubygem-bundler
RHEL 9
0:2.2.33-165.el9_5
fixed
rubygem-io-console
RHEL 9
0:0.5.7-165.el9_5
fixed
rubygem-irb
RHEL 9
0:1.3.5-165.el9_5
fixed
rubygem-json
RHEL 9
0:2.5.1-165.el9_5
fixed
rubygem-minitest
RHEL 9
0:5.14.2-165.el9_5
fixed
rubygem-power
RHEL 9
0:1.2.1-165.el9_5
fixed
rubygem-psych
RHEL 9
0:3.3.2-165.el9_5
fixed
rubygem-rake
RHEL 9
0:13.0.3-165.el9_5
fixed
rubygem-rbs
RHEL 9
0:1.4.0-165.el9_5
fixed
rubygem-rdoc
RHEL 9
0:6.3.4.1-165.el9_5
fixed
rubygem-rexml
RHEL 9
0:3.2.5-165.el9_5
fixed
rubygem-rss
RHEL 9
0:0.2.9-165.el9_5
fixed
rubygem-test-unit
RHEL 9
0:3.3.7-165.el9_5
fixed
rubygem-typeprof
RHEL 9
0:0.15.2-165.el9_5
fixed
rubygems
RHEL 9
0:3.2.33-165.el9_5
fixed
rubygems-devel
RHEL 9
0:3.2.33-165.el9_5
fixed
Common Weakness Enumeration
References
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27219.yml
https://hackerone.com/reports/2936778
https://lists.debian.org/debian-lts-announce/2025/03/msg00008.html