CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NCVE-2021-41819
High (7.5). EPSS 3.2% chance of exploitation in the next 30 days. Fixed in cgi 0.1.0.1, 0.2.1, 0.3.1.
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.
Severity
- EPSS
- 3.2% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-10-31)
- CWE
- CWE-565
- Published
- Modified
- Record from
- the NVD, synced
Affected
- debian:debian_linux
- fedoraproject:fedora
- opensuse:factory
- opensuse:leap
- redhat:enterprise_linux
- redhat:software_collections
- ruby-lang:cgi
- ruby-lang:ruby
- suse:linux_enterprise
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-4vf4-qmvg-mh7h | RubyGems | cgi | >=0.3.0 <0.3.1 | 0.3.1 |
| GHSA-4vf4-qmvg-mh7h | RubyGems | cgi | >=0.2.0 <0.2.1 | 0.2.1 |
| GHSA-4vf4-qmvg-mh7h | RubyGems | cgi | <0.1.0.1 | 0.1.0.1 |
References
- https://hackerone.com/reports/910552
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF/
- https://security.gentoo.org/glsa/202401-27
- https://security.netapp.com/advisory/ntap-20220121-0003/