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CVE-2021-41819

CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby.

Published: Jan 1, 2022Updated: May 22, 2025 Sources: CVE List NVD GHSA BDUCWE-565
7.5HIGH
NVD MITRE
EPSS Score
2.9%
Top 14.6%
CISA KEV
Not in KEV
Exploits
2 Known
Remediation
Patch Available
Self-Check
OpenVAS

Description

Cookie Prefix Spoofing in CGI::Cookie.parse

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-565

Affected Products

ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Astra Linux Special EditionOn-premOS
Operating Systems / linux-distro
Astra Linux Special Edition для «Эльбрус»On-premOS
Operating Systems / linux-distro
ruby-lang
oss-projectaka ruby, rexml
cgiLibraryLibrary
OSS Libraries / generic-library
rubyLibrary
OSS Libraries / generic-library
redhat
commercial·USaka red hat
software collectionsOn-prem
Operating Systems / linux-distro
enterprise linuxOn-premOS
Operating Systems / linux-distro
opensuse
oss-project·DE
factoryOn-prem
Operating Systems / linux-distro
leapOn-premOS
Operating Systems / linux-distro
RubyGems
package-ecosystem
cgi
OSS Libraries
Сообщество свободного программного обеспечения
oss-projectaka fsf
Debian GNU/LinuxOn-premOS
Operating Systems / linux-distro
and 8 more affected products View all →

Exploitability

2 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
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References

https://nvd.nist.gov/vuln/detail/CVE-2021-41819
nvd.nist.gov
https://hackerone.com/reports/910552
hackerone.com
https://github.com/ruby/cgi
github.com
and 23 more references View all →
News mentions
Could not load news mentions.

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