CVE-2025-14523 | BDVDB-2026-305443 Detail

Description#

A flaw in libsoup’s HTTP header handling allows multiple Host: headers in a request and returns the last occurrence for server-side processing. Common front proxies often honor the first Host: header, so this mismatch can cause vhost confusion where a proxy routes a request to one backend but the backend interprets it as destined for another host. This discrepancy enables request-smuggling style attacks, cache poisoning, or bypassing host-based access controls when an attacker supplies duplicate Host headers.

Impact#

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Exploit#

History#

1. Version 12025-12-11Record published in the CVE List.
2. Version 22026-11-04Most recent update recorded in the CVE List.