🛡️ CVE-2025-14523
🟠 CVSS 8.2 — High ✅ No Known Exploit CWE-444 NVD
8.2
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity HIGH
CVSS Score 8.2
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
CWE CWE-444
Public Exploit ✅ No
Source NVD
Published 2025-12-11
Updated 2026-06-02
Modified 2026-04-15
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown

References

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