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Fedora 43 libsoup Critical Duplicate Host Header Issue CVE-2025-14523

fedora
Calendar Grey January 27, 2026
Dist Fedora Esm H88
Backport fix for critical CVE-2025-14523 in Fedora libsoup ensures improved security and stability for users.
Backport fix for CVE-2025-14523

Summary

Libsoup is an HTTP library implementation in C. It was originally part

of a SOAP (Simple Object Access Protocol) implementation called Soup, but

the SOAP and non-SOAP parts have now been split into separate packages.

libsoup uses the Glib main loop and is designed to work well with GTK

applications. This enables GNOME applications to access HTTP servers

on the network in a completely asynchronous fashion, very similar to

the Gtk+ programming model (a synchronous operation mode is also

supported for those who want it).

This is the MinGW build of Libsoup

Update Information:

Backport fix for CVE-2025-14523

Topics%20covered

Topics Covered

security advisory fedora critical libsoup backport patch duplicate header

Change Log

* Sat Jan 17 2026 Sandro Mani - 2.74.3-16 - Backport patch for CVE-2025-14523 * Fri Jan 16 2026 Fedora Release Engineering - 2.74.3-15 - Rebuilt for https://fedoraproject.org/wiki/Fedora_44_Mass_Rebuild

References


[ 1 ] Bug #2421353 - CVE-2025-14523 mingw-libsoup: libsoup: Duplicate Host Header Handling Causes Host-Parsing Discrepancy (First- vs Last-Value Wins) [fedora-42] https://bugzilla.redhat.com/show_bug.cgi?id=2421353 [ 2 ] Bug #2421356 - CVE-2025-14523 mingw-libsoup: libsoup: Duplicate Host Header Handling Causes Host-Parsing Discrepancy (First- vs Last-Value Wins) [fedora-43] https://bugzilla.redhat.com/show_bug.cgi?id=2421356

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-20b533bbc7' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

Severity
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Name: mingw-libsoup
Product: Fedora 43
Version: 2.74.3
Release: 16.fc43
URL: https://wiki.gnome.org/Projects/libsoup
Summary: MinGW library for HTTP and XML-RPC functionality

Topics%20covered

Topics Covered

security advisory fedora critical libsoup backport patch duplicate header

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