diff --git a/vcpkg/overlay/qgis-qt6/auth_awss3_qt66.patch b/vcpkg/overlay/qgis-qt6/auth_awss3_qt66.patch
new file mode 100644
index 0000000000..267bcec4c8
--- /dev/null
+++ b/vcpkg/overlay/qgis-qt6/auth_awss3_qt66.patch
@@ -0,0 +1,13 @@
+diff --git a/src/auth/awss3/core/qgsauthawss3method.cpp b/src/auth/awss3/core/qgsauthawss3method.cpp
+index 2248f3438cb..c76871443a0 100644
+--- a/src/auth/awss3/core/qgsauthawss3method.cpp
++++ b/src/auth/awss3/core/qgsauthawss3method.cpp
+@@ -118,7 +118,7 @@ bool QgsAuthAwsS3Method::updateNetworkRequest( QNetworkRequest &request, const Q
+   const QByteArray signingKey = QMessageAuthenticationCode::hash( "aws4_request",
+                                 QMessageAuthenticationCode::hash( "s3",
+                                     QMessageAuthenticationCode::hash( region,
+-                                        QMessageAuthenticationCode::hash( date, "AWS4" + password,
++                                        QMessageAuthenticationCode::hash( date, QByteArray( "AWS4" + password ),
+                                             QCryptographicHash::Sha256 ),
+                                         QCryptographicHash::Sha256 ),
+                                     QCryptographicHash::Sha256 ),
diff --git a/vcpkg/overlay/qgis-qt6/portfile.cmake b/vcpkg/overlay/qgis-qt6/portfile.cmake
index d6ab1f0010..ba173f82fb 100644
--- a/vcpkg/overlay/qgis-qt6/portfile.cmake
+++ b/vcpkg/overlay/qgis-qt6/portfile.cmake
@@ -27,6 +27,8 @@ vcpkg_from_github(
         exif_orientation_fix.patch # Remove when updating to QGIS 3.34.1
         layout_fix.patch # Remove when updating to QGIS 3.34
         qsharedmemory_android.patch # Qt 6.6 removed dummy QSharedMemory implementation on Android
+        wcs_capabilities_qt66.patch # Qt 6.6 compilation fix
+        auth_awss3_qt66.patch # Qt 6.6 compilation fix
 )
 
 file(REMOVE ${SOURCE_PATH}/cmake/FindQtKeychain.cmake)
diff --git a/vcpkg/overlay/qgis-qt6/wcs_capabilities_qt66.patch b/vcpkg/overlay/qgis-qt6/wcs_capabilities_qt66.patch
new file mode 100644
index 0000000000..e074139c41
--- /dev/null
+++ b/vcpkg/overlay/qgis-qt6/wcs_capabilities_qt66.patch
@@ -0,0 +1,28 @@
+diff --git a/src/providers/wcs/qgswcscapabilities.cpp b/src/providers/wcs/qgswcscapabilities.cpp
+index ca3418cb11f..0ddce374835 100644
+--- a/src/providers/wcs/qgswcscapabilities.cpp
++++ b/src/providers/wcs/qgswcscapabilities.cpp
+@@ -1312,12 +1312,12 @@ QgsWcsCoverageSummary *QgsWcsCapabilities::coverageSummary( QString const &ident
+   {
+     if ( c->identifier == identifier )
+     {
+-      return c;
++      return &(*c);
+     }
+     else
+     {
+       // search sub coverages
+-      QgsWcsCoverageSummary *subCoverage = coverageSummary( identifier, c );
++      QgsWcsCoverageSummary *subCoverage = coverageSummary( identifier, &(*c) );
+       if ( subCoverage )
+       {
+         return subCoverage;
+@@ -1343,7 +1343,7 @@ QList<QgsWcsCoverageSummary> QgsWcsCapabilities::coverageSummaries( QgsWcsCovera
+   for ( QVector<QgsWcsCoverageSummary>::iterator c = parent->coverageSummary.begin(); c != parent->coverageSummary.end(); ++c )
+   {
+     list.append( *c );
+-    list.append( coverageSummaries( c ) );
++    list.append( coverageSummaries( &(*c) ) );
+   }
+   return list;
+ }