CVE-2021-41819

HighCVSS 7.5/10Last modified Jun 17, 2026

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 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-565

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://hackerone.com/reports/910552Permissions Required, Third Party Advisory
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/Third Party Advisory
https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819/Exploit, Vendor Advisory
https://hackerone.com/reports/910552Permissions Required, Third Party Advisory
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/Third Party Advisory
https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819/Exploit, Vendor Advisory

Timeline

Published: Jan 1, 2022
Last modified: Jun 17, 2026
NVD status: Modified

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