diff --git a/migrations/0020_alter_validationrequest_status_reason_and_more.py b/migrations/0020_alter_validationrequest_status_reason_and_more.py
new file mode 100644
index 0000000..2674e18
--- /dev/null
+++ b/migrations/0020_alter_validationrequest_status_reason_and_more.py
@@ -0,0 +1,24 @@
+# Generated by Django 5.2.4 on 2025-12-29 21:10
+
+import apps.ifc_validation_models.models
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('ifc_validation_models', '0019_alter_validationrequest_file'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='validationrequest',
+            name='status_reason',
+            field=apps.ifc_validation_models.models.SanitizedCharField(blank=True, help_text='Reason for current status.', null=True),
+        ),
+        migrations.AlterField(
+            model_name='validationtask',
+            name='status_reason',
+            field=apps.ifc_validation_models.models.SanitizedCharField(blank=True, help_text='Reason for current status.', null=True),
+        ),
+    ]
diff --git a/models.py b/models.py
index 91ca44c..a8b3c6a 100644
--- a/models.py
+++ b/models.py
@@ -39,6 +39,18 @@ def get_user_context():
         raise ImproperlyConfigured(msg)
 
 
+class SanitizedCharField(models.CharField):
+    """
+    A CharField that sanitizes input by replacing null characters.
+    """
+
+    def get_prep_value(self, value):
+        value = super().get_prep_value(value)
+        if value is not None:
+            value = value.replace('\x00', '')
+        return value
+
+
 class SoftDeletableModel(models.Model):
     """An abstract base class that provides soft-deletable Models."""
 
@@ -831,8 +843,10 @@ class Channel(models.TextChoices):
         help_text="Current status of the Validation Request.",
     )
 
-    status_reason = models.TextField(
-        null=True, blank=True, help_text="Reason for current status."
+    status_reason = SanitizedCharField(
+        null=True, 
+        blank=True, 
+        help_text="Reason for current status."
     )
 
     started = models.DateTimeField(
@@ -1026,7 +1040,7 @@ class Status(models.TextChoices):
         help_text="Current status of the Validation Task.",
     )
 
-    status_reason = models.TextField(
+    status_reason = SanitizedCharField(
         null=True,
         blank=True,
         help_text="Reason for current status."