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OpenAdvisories
High ALAS2-2026-3142 1 CVE

Important: libsoup security update (Amazon Linux 2)

Published Feb 5, 2026 · Updated Feb 5, 2026

Summary

Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2025-14523: 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.

Fixed packages 3

ReleasePackageFixed in
Amazon Linux · 2 libsoup 0:2.56.0-6.amzn2.0.7
Amazon Linux · 2 libsoup-debuginfo 0:2.56.0-6.amzn2.0.7
Amazon Linux · 2 libsoup-devel 0:2.56.0-6.amzn2.0.7

Vulnerabilities 1

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-14523.html