diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b897ec295..c7ddee1a2 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -70,7 +70,7 @@ jobs:
     container: ubuntu:${{ matrix.container }}
     strategy:
       matrix:
-        container: ['22.04', '24.04', '25.04', '25.10']
+        container: ['22.04', '24.04', '25.10', '26.04']
         arch: ['amd64', 'arm64']
     env:
       DEBIAN_FRONTEND: noninteractive
@@ -116,7 +116,7 @@ jobs:
     container: fedora:${{ matrix.container }}
     strategy:
       matrix:
-        container: [42, 43]
+        container: [42, 43, 44]
     steps:
     - name: Download artifact
       uses: dawidd6/action-download-artifact@v11
diff --git a/client/dialogs/RoleAddressDialog.cpp b/client/dialogs/RoleAddressDialog.cpp
index 362e31a2b..bdf590973 100644
--- a/client/dialogs/RoleAddressDialog.cpp
+++ b/client/dialogs/RoleAddressDialog.cpp
@@ -23,11 +23,25 @@
 #include "Settings.h"
 #include "effects/Overlay.h"
 
+#include <QtGui/QValidator>
 #include <QtWidgets/QCompleter>
 #include <QtWidgets/QListView>
 
 class RoleAddressDialog::Private: public Ui::RoleAddressDialog {};
 
+class SanitizingValidator: public QValidator {
+public:
+	using QValidator::QValidator;
+	State validate(QString &input, int &pos) const override {
+		static const QRegularExpression invalid(
+			QStringLiteral("[\\x00-\\x08\\x0B\\x0C\\x0E-\\x1F\\x{FFFE}\\x{FFFF}]"));
+		int before = input.size();
+		input.remove(invalid);
+		pos = qMax(0, pos - (before - input.size()));
+		return Acceptable;
+	}
+};
+
 RoleAddressDialog::RoleAddressDialog(QWidget *parent)
 	: QDialog(parent)
 	, d(new Private)
@@ -37,17 +51,18 @@ RoleAddressDialog::RoleAddressDialog(QWidget *parent)
 	d->buttonLayout->setDirection(QBoxLayout::RightToLeft);
 #endif
 	setWindowFlags(Qt::Dialog | Qt::CustomizeWindowHint);
-	for(QLineEdit *w: findChildren<QLineEdit*>())
-		w->setAttribute(Qt::WA_MacShowFocusRect, false);
 
 	connect( d->cancel, &QPushButton::clicked, this, &RoleAddressDialog::reject );
 	connect( d->sign, &QPushButton::clicked, this, &RoleAddressDialog::accept );
 
+	auto *validator = new SanitizingValidator(this);
 	auto list = findChildren<QLineEdit*>();
 	if(!list.isEmpty())
 		list.first()->setFocus();
 	for(QLineEdit *line: list)
 	{
+		line->setAttribute(Qt::WA_MacShowFocusRect, false);
+		line->setValidator(validator);
 		Settings::Option<QStringList> s{line->objectName(), {}};
 		auto *completer = new QCompleter(s, line);
 		completer->setMaxVisibleItems(10);