HTTP Request Smuggling Affecting libsoup3-doc package, versions <0:3.6.5-3.el10_1.8


Severity

Recommended
0.0
high
0
10

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.54% (44th percentile)

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  • Snyk IDSNYK-ALMALINUX10-LIBSOUP3DOC-15037397
  • published20 Jan 2026
  • disclosed12 Jan 2026

Introduced: 12 Jan 2026

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

How to fix?

Upgrade AlmaLinux:10 libsoup3-doc to version 0:3.6.5-3.el10_1.8 or higher.
This issue was patched in ALSA-2026:0423.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsoup3-doc package and not the libsoup3-doc package as distributed by AlmaLinux. See How to fix? for AlmaLinux:10 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