CVE-2022-27779

libcurl wrongly allows cookies to be set for Top Level Domains (TLDs) if thehost name is provided with a trailing dot.curl can be told to receive and send cookies. curl's "cookie engine" can bebuilt with or without [Public Suffix List](https://publicsuffix.org/)awareness. If PSL support not provided, a more rudimentary check exists to atleast prevent cookies from being set on TLDs. This check was broken if thehost name in the URL uses a trailing dot.This can allow arbitrary sites to set cookies that then would get sent to adifferent and unrelated site or domain.

• CWE-201

• https://hackerone.com/reports/1553301Exploit, Third Party Advisory
• https://security.gentoo.org/glsa/202212-01Third Party Advisory
• https://security.netapp.com/advisory/ntap-20220609-0009/Third Party Advisory
• https://hackerone.com/reports/1553301Exploit, Third Party Advisory
• https://security.gentoo.org/glsa/202212-01Third Party Advisory
• https://security.netapp.com/advisory/ntap-20220609-0009/Third Party Advisory

Published

Jun 2, 2022

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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