HTTP Request Smuggling Affecting spice-client-win-x64 package, versions <0:8.10-6.el8_6.1


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.55% (44th percentile)

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  • Snyk IDSNYK-RHEL8-SPICECLIENTWINX64-15145960
  • published29 Jan 2026
  • disclosed11 Dec 2025

Introduced: 11 Dec 2025

CVE-2025-14523  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade RHEL:8 spice-client-win-x64 to version 0:8.10-6.el8_6.1 or higher.
This issue was patched in RHSA-2026:1570.

NVD Description

Note: Versions mentioned in the description apply only to the upstream spice-client-win-x64 package and not the spice-client-win-x64 package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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 Base Scores

version 3.1