CVE-2025-14523

HIGH EPSS 38.8%
Published Dec 11, 20256mo ago · Modified Jun 17, 20262w ago
8.2 CVSS 3.1
High
Find Similar
Published Dec 11, 2025 6mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
8.2
Exploitability
3.9
Impact
4.2
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
38.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-444

References 21

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.