CVE-2026-82209

01/תיאור (מקור, אנגלית)

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`).

02/מוצרים מושפעים

haxx: curl

03/קישורים4

• curl.se/docs/CVE-2026-82209.html PatchVendor Advisory
• curl.se/docs/CVE-2026-82209.json Vendor Advisory
• hackerone.com/reports/3972385 ExploitMitigationThird Party Advisory
• hackerone.com/reports/3972385 ExploitMitigationThird Party Advisory