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.
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History
Wed, 14 Oct 2026 17:30:00 +0000
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Status: PUBLISHED
Assigner: hackerone
Published: 2022-06-01T00:00:00.000Z
Updated: 2026-10-14T16:20:08.776Z
Reserved: 2022-03-23T00:00:00.000Z
Link: CVE-2022-27779
No data.
Status : Modified
Published: 2022-06-02T14:15:44.093
Modified: 2026-10-14T17:17:37.080
Link: CVE-2022-27779