CVE-2026-82209

When libpsl support is enabled, libcurl fails to enforce the Public Suffix

List boundary check when processing a `Set-Cookie` header where the `Domain`

attribute explicitly matches an origin host that is itself a public suffix

(e.g., `Domain=co.uk` set by `co.uk`).

Instead of coercing it into a strict host-only cookie, libcurl saves the

cookie with wildcard domain scope (`.co.uk`). Consequently, the cookie is

inappropriately included in subsequent outbound requests or HTTP redirects to

arbitrary sibling subdomains under the same public suffix (e.g.,

`attacker.co.uk`).