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.
References
Configurations
No configuration.
History
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Information
Published : 2025-12-11 13:15
Updated : 2026-01-29 16:16
NVD link : CVE-2025-14523
Mitre link : CVE-2025-14523
CVE.ORG link : CVE-2025-14523
JSON object : View
Products Affected
No product.
CWE
CWE-444
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')