diff --git a/.github/workflows/php.yaml b/.github/workflows/php.yaml
index b03e4f0e2..de63ad92e 100644
--- a/.github/workflows/php.yaml
+++ b/.github/workflows/php.yaml
@@ -25,3 +25,23 @@ jobs:
         uses: ./.github/workflows/action-phpstan.yml
         with:
             extension_name: ${{ github.event.repository.name }}
+
+    extension_verifier:
+        name: Extension Verifier (lowest)
+        runs-on: ubuntu-latest
+        steps:
+            - name: Checkout SwagMigrationAssistant
+              uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+
+            - name: Remove PHPStan config
+              run: rm phpstan.neon.dist
+
+            - name: Allow composer to resolve advisory-affected releases
+              run: composer config policy.advisories.block false
+
+            - name: Run verifier
+              uses: shopware/github-actions/extension-verifier@main
+              with:
+                  action: check
+                  check-against: lowest
+                  exclude: stylelint
diff --git a/.shopware-extension.yml b/.shopware-extension.yml
new file mode 100644
index 000000000..3627338f5
--- /dev/null
+++ b/.shopware-extension.yml
@@ -0,0 +1,8 @@
+# yaml-language-server: $schema=https://shopware.github.io/shopware-cli/shopware-extension-schema.json
+compatibility_date: '2026-08-14'
+
+validation:
+    ignore:
+        # The verifier's PHPStan cannot see functions defined in vendor PSR-4 files, these resolve at runtime.
+        - message: 'Function service not found'
+        - message: 'Function tagged_iterator not found'
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6badf04be..974e1560f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 - #18902 - Fixed a bug in media migration whereby failed downloads were not marked as definitively failed once the retry attempts had been exhausted. As a result, processing could not be completed correctly.
 - #17832 - Fixed attribute migration so custom fields with an empty label no longer abort the run. The reader now keeps the `column_name` in the attribute configuration.
 - #12748 - Fixed order migration so `product.sales` is recalculated from persisted order line items after migrated orders are written. Cancelled orders are excluded from the sales calculation.
+- Fixed attribute migration on installations that resolve Doctrine DBAL 4.2, where reading attributes through the Shopware local gateway aborted the run.
 
 # 18.0.0
 
diff --git a/CHANGELOG_de-DE.md b/CHANGELOG_de-DE.md
index 7d9efcb87..57e93eb9c 100644
--- a/CHANGELOG_de-DE.md
+++ b/CHANGELOG_de-DE.md
@@ -3,6 +3,7 @@
 - #18902 - Fehler bei der Medienmigration behoben, durch den fehlgeschlagene Downloads nach Ablauf der Wiederholungsversuche nicht als endgültig fehlgeschlagen markiert wurden. Dadurch konnte die Verarbeitung nicht korrekt abgeschlossen werden.
 - #17832 - Die Attribut-Migration wurde korrigiert, sodass Zusatzfelder mit leerem Label die Migration nicht mehr abbrechen. Der Reader behält nun den `column_name` in der Attributkonfiguration.
 - #12748 - Die Migration von Bestellungen wurde korrigiert, sodass `product.sales` nach dem Schreiben migrierter Bestellungen anhand der persistierten Bestellpositionen neu berechnet wird. Stornierte Bestellungen werden dabei nicht berücksichtigt.
+- Die Attribut-Migration wurde für Installationen korrigiert, die Doctrine DBAL 4.2 auflösen. Dort brach das Lesen der Attribute über das lokale Shopware-Gateway die Migration ab.
 
 # 18.0.0
 
diff --git a/composer.json b/composer.json
index b64699e06..11cce2021 100644
--- a/composer.json
+++ b/composer.json
@@ -12,6 +12,9 @@
     "require": {
         "shopware/core": "~6.7"
     },
+    "suggest": {
+        "shopware/storefront": "Required for migrating themes and their sales channel assignments"
+    },
     "extra": {
         "shopware-plugin-class": "SwagMigrationAssistant\\SwagMigrationAssistant",
         "plugin-icon": "src/Resources/config/plugin.png",
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index 47c7c4755..5455f057a 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -48,6 +48,9 @@ parameters:
         - message: '#Call to deprecated method listTableForeignKeys\(\) of class Doctrine\\DBAL\\Schema\\AbstractSchemaManager#'
           paths:
               - src/Profile/Shopware/Gateway/Local/Reader/AttributeReader.php
+        - message: '#Call to deprecated method getLocalColumns\(\) of class Doctrine\\DBAL\\Schema\\ForeignKeyConstraint#'
+          paths:
+              - src/Profile/Shopware/Gateway/Local/Reader/AttributeReader.php
 
         # TODO: The MainOrContainer type cannot fully express its state after nested array mutations
         - identifier: parameterByRef.type
diff --git a/src/Profile/Shopware/Gateway/Local/Reader/AttributeReader.php b/src/Profile/Shopware/Gateway/Local/Reader/AttributeReader.php
index f17bbf89b..77309a7c1 100644
--- a/src/Profile/Shopware/Gateway/Local/Reader/AttributeReader.php
+++ b/src/Profile/Shopware/Gateway/Local/Reader/AttributeReader.php
@@ -9,7 +9,6 @@
 
 use Doctrine\DBAL\Schema\Column;
 use Doctrine\DBAL\Schema\ForeignKeyConstraint;
-use Doctrine\DBAL\Schema\Name\UnqualifiedName;
 use Doctrine\DBAL\Types\AsciiStringType;
 use Doctrine\DBAL\Types\BigIntType;
 use Doctrine\DBAL\Types\BinaryType;
@@ -192,7 +191,8 @@ private function cleanupColumns(array $columns, array $foreignKeys): array
         $fks = [];
 
         foreach ($foreignKeys as $foreignKey) {
-            $fks[] = array_map(static fn (UnqualifiedName $name) => $name->toString(), $foreignKey->getReferencingColumnNames());
+            // getLocalColumns() is deprecated, but getReferencingColumnNames() needs DBAL 4.3+ (Shopware 6.7.0/6.7.1 can lock DBAL 4.2)
+            $fks[] = $foreignKey->getLocalColumns();
         }
 
         if ($fks !== []) {