{"schemaVersion":3,"id":"CVE-2025-14523","aliases":["SUSE-SU-2026:0123-1","SUSE-SU-2026:20053-1","RHSA-2026:0421","RHSA-2026:0422","RHSA-2026:0423","RHSA-2026:0836","RHSA-2026:0867","RHSA-2026:0868","RHSA-2026:0905","RHSA-2026:0906","RHSA-2026:0907","RHSA-2026:0908","RHSA-2026:0909","RHSA-2026:0911","RHSA-2026:0925","RHSA-2026:1509","RHSA-2026:1569","RHSA-2026:1570","RHSA-2026:1571","RHSA-2026:1572","UBUNTU-CVE-2025-14523","DEBIAN-CVE-2025-14523","openSUSE-SU-2026:10023-1","openSUSE-SU-2026:10024-1"],"status":"published","duplicateOf":null,"title":null,"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. 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