diff --git a/vagrant-libvirt-0.12.2-Replace-CGI.parse-with-URI-equivalent.patch b/vagrant-libvirt-0.12.2-Replace-CGI.parse-with-URI-equivalent.patch
new file mode 100644
index 0000000..1e041d2
--- /dev/null
+++ b/vagrant-libvirt-0.12.2-Replace-CGI.parse-with-URI-equivalent.patch
@@ -0,0 +1,41 @@
+From dfb9fd59bd6eca13f4e22e5038247473f9cd108d Mon Sep 17 00:00:00 2001
+From: Jarek Prokop <jprokop@redhat.com>
+Date: Tue, 16 Dec 2025 12:18:01 +0100
+Subject: [PATCH] Replace CGI.parse with URI equivalent.
+
+For Ruby 4.0 compatibility, where CGI is no longer a part
+of the upstream Ruby distribution.
+
+Replace the CGI.parse with URI.decode_www_form and some filtering
+on top so that the replacement keeps existing behavior.
+---
+ lib/vagrant-libvirt/config.rb | 10 +++++++---
+ 1 file changed, 7 insertions(+), 3 deletions(-)
+
+diff --git a/lib/vagrant-libvirt/config.rb b/lib/vagrant-libvirt/config.rb
+index cdee174..96261ca 100644
+--- a/lib/vagrant-libvirt/config.rb
++++ b/lib/vagrant-libvirt/config.rb
+@@ -1,6 +1,6 @@
+ # frozen_string_literal: true
+ 
+-require 'cgi'
++require 'uri'
+ 
+ require 'vagrant'
+ require 'vagrant/action/builtin/mixin_synced_folders'
+@@ -1335,8 +1335,12 @@ module VagrantPlugins
+         @username = nil if @username == UNSET_VALUE
+         @username = uri.user if uri.user
+         if uri.query
+-          params = CGI.parse(uri.query)
+-          @id_ssh_key_file = params['keyfile'].first if params.has_key?('keyfile')
++          params = URI
++            .decode_www_form(uri.query)
++            .select { |k, v| k == 'keyfile' }
++            .map { |_,v| v }
++            .first
++          @id_ssh_key_file = params if params
+         end
+ 
+         finalize_id_ssh_key_file
diff --git a/vagrant-libvirt.spec b/vagrant-libvirt.spec
index 0c38496..ad18051 100644
--- a/vagrant-libvirt.spec
+++ b/vagrant-libvirt.spec
@@ -4,7 +4,7 @@
 
 Name: %{vagrant_plugin_name}
 Version: 0.11.2
-Release: 8%{?dist}
+Release: 11%{?dist}
 Summary: libvirt provider for Vagrant
 License: MIT
 URL: https://github.com/vagrant-libvirt/vagrant-libvirt
@@ -33,6 +33,9 @@ Patch3: vagrant-libvirt-0.12.2-Remove-config-unsupported-by-fog-libvirt.patch
 # Fix compatibility with REXML 3.4.2+
 # https://github.com/vagrant-libvirt/vagrant-libvirt/pull/1861
 Patch4: vagrant-libvirt-0.12.2-Fix-REXML-3-4-2-compatibility.patch
+# Replace CGI, removed from Ruby 4.0 bundled gems with URI.
+# https://github.com/vagrant-libvirt/vagrant-libvirt/pull/1866
+Patch5: vagrant-libvirt-0.12.2-Replace-CGI.parse-with-URI-equivalent.patch
 
 # Enable QEMU Session by default
 # https://github.com/vagrant-libvirt/vagrant-libvirt/pull/969
@@ -84,6 +87,7 @@ Documentation for %{name}.
 %patch 2 -p1
 %patch 3 -p1
 %patch 4 -p1
+%patch 5 -p1
 %patch 100 -p1
 
 %build
@@ -153,9 +157,21 @@ popd
 %{vagrant_plugin_instdir}/spec
 
 %changelog
+* Fri Jul 17 2026 Fedora Release Engineering <releng@fedoraproject.org> - 0.11.2-11
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild
+
+* Sat Jan 17 2026 Fedora Release Engineering <releng@fedoraproject.org> - 0.11.2-10
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_44_Mass_Rebuild
+
+* Tue Dec 16 2025 Jarek Prokop <jprokop@redhat.com> - 0.11.2-9
+- Fix Ruby 4.0 compatibility by replacing CGI with URI equivalent.
+
 * Mon Nov 03 2025 Vít Ondruch <vondruch@redhat.com> - 0.11.2-8
 - Fix compatibility with REXML 3.4.2+
 
+* Fri Jul 25 2025 Fedora Release Engineering <releng@fedoraproject.org> - 0.11.2-7
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild
+
 * Sun Jan 19 2025 Fedora Release Engineering <releng@fedoraproject.org> - 0.11.2-6
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild