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.
CVE-2022-27779
CVSS base score
5.3 (v3.1)
Severity
MEDIUM
Attack vector
Network
Weakness
CWE-201
Last modified
November 2, 2026
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products
haxx curl
netapp hci bootstrap os
netapp clustered data ontap
netapp solidfire\
netapp solidfire \& hci management node
netapp hci compute node
netapp h410s firmware
netapp h700s firmware
netapp h500s firmware
netapp h300s firmware
References
- hackerone.com Exploit, Third Party Advisory
- security.gentoo.org Third Party Advisory
- security.netapp.com Third Party Advisory
- hackerone.com Exploit, Third Party Advisory
- security.gentoo.org Third Party Advisory
- security.netapp.com Third Party Advisory
- cert-portal.siemens.com