CVE-2021-41819
HIGHCVSS 7.5/10EPSS 2.93%
Last modified
CVE-2021-41819 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 2.93% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Ruby-Lang | Cgi | 0.1.0 | — |
| Ruby-Lang | Cgi | 0.2.0 | — |
| Ruby-Lang | Cgi | 0.3.0 | — |
| Ruby-Lang | Ruby | <= 2.6.8 | — |
| Ruby-Lang | Ruby | >= 2.7.0, < 2.7.5 | — |
| Ruby-Lang | Ruby | >= 3.0.0, < 3.0.3 | — |
| Redhat | Software Collections | All versions | — |
| Redhat | Enterprise Linux | 8.0 | — |
| Debian | Debian Linux | 9.0 | — |
| Debian | Debian Linux | 10.0 | — |
| Debian | Debian Linux | 11.0 | — |
| Suse | Linux Enterprise | 11.0 | Sp1 |
| Suse | Linux Enterprise | 12.0 | — |
| Suse | Linux Enterprise | 15.0 | — |
| Opensuse | Factory | All versions | — |
| Opensuse | Leap | 15.2 | — |
| Fedoraproject | Fedora | 34 | — |
| Fedoraproject | Fedora | 35 | — |
References
- https://hackerone.com/reports/910552Permissions Required, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220121-0003/Third Party Advisory
- https://hackerone.com/reports/910552Permissions Required, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220121-0003/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2021-41819?
CVE-2021-41819 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.93% probability of exploitation in the next 30 days.
How do I fix CVE-2021-41819?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-41819?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST