CVE-2021-41819
CVSS v3
7.5
HIGH
EPSS Score
2.9 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2022-01-01
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.
Is CVE-2021-41819 actively exploited?
Active exploitation of CVE-2021-41819 has not been confirmed. Its EPSS score was 2.9% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-41819?
CVE-2021-41819 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-41819 affecting your environment?
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