diff --git a/readthedocs/oauth/migrations/0019_githubapp_add_extra_fields.py b/readthedocs/oauth/migrations/0019_githubapp_add_extra_fields.py
new file mode 100644
index 00000000000..56871fa019f
--- /dev/null
+++ b/readthedocs/oauth/migrations/0019_githubapp_add_extra_fields.py
@@ -0,0 +1,33 @@
+# Generated by Django 5.2.11 on 2026-03-04 23:02
+
+from django.db import migrations
+from django.db import models
+from django_safemigrate import Safe
+
+
+class Migration(migrations.Migration):
+    safe = Safe.before_deploy()
+    dependencies = [
+        ("oauth", "0018_githubapp"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="githubappinstallation",
+            name="all_repositories_selected",
+            field=models.BooleanField(
+                db_default=False,
+                default=False,
+                help_text="Whether the installation has access to all repositories or just some of them",
+            ),
+        ),
+        migrations.AddField(
+            model_name="githubappinstallation",
+            name="target_login",
+            field=models.CharField(
+                help_text="The account login the installation belongs to",
+                max_length=255,
+                null=True,
+            ),
+        ),
+    ]
diff --git a/readthedocs/oauth/models.py b/readthedocs/oauth/models.py
index 5cf93bb7d6d..90038eb2743 100644
--- a/readthedocs/oauth/models.py
+++ b/readthedocs/oauth/models.py
@@ -34,14 +34,26 @@ def get_or_create_installation(
         Only the installation_id is unique, the target_id and target_type could change,
         but this should never happen.
         """
+        extra_data = extra_data or {}
         installation, created = self.get_or_create(
             installation_id=installation_id,
             defaults={
                 "target_id": target_id,
                 "target_type": target_type,
-                "extra_data": extra_data or {},
+                "extra_data": extra_data,
             },
         )
+
+        # Keep the extra data about the installation up to date.
+        new_installation_data = extra_data.get("installation", {})
+        installation_has_changed = (
+            new_installation_data
+            and new_installation_data != installation.extra_data.get("installation", {})
+        )
+        if not created and installation_has_changed:
+            installation.extra_data = extra_data
+            installation.save()
+
         # NOTE: An installation can't change its target_id or target_type.
         # This should never happen, unless this assumption is wrong.
         if installation.target_id != target_id or installation.target_type != target_type:
@@ -78,6 +90,16 @@ class GitHubAppInstallation(TimeStampedModel):
         choices=GitHubAccountType,
         max_length=255,
     )
+    target_login = models.CharField(
+        help_text=_("The account login the installation belongs to"),
+        null=True,
+        max_length=255,
+    )
+    all_repositories_selected = models.BooleanField(
+        help_text=_("Whether the installation has access to all repositories or just some of them"),
+        db_default=False,
+        default=False,
+    )
     extra_data = models.JSONField(
         help_text=_("Extra data returned by the webhook when the installation is created"),
         default=dict,
@@ -173,6 +195,12 @@ def delete_organization(self, organization_id: int):
             target_type=self.target_type,
         )
 
+    def save(self, *args, **kwargs):
+        installation_data = self.extra_data.get("installation", {})
+        self.target_login = installation_data.get("account", {}).get("login")
+        self.all_repositories_selected = installation_data.get("repository_selection") == "all"
+        super().save(*args, **kwargs)
+
 
 class RemoteOrganization(TimeStampedModel):
     """
diff --git a/readthedocs/oauth/tests/test_githubapp_webhook.py b/readthedocs/oauth/tests/test_githubapp_webhook.py
index 2b1a3e9d5c8..dc0b802a4cb 100644
--- a/readthedocs/oauth/tests/test_githubapp_webhook.py
+++ b/readthedocs/oauth/tests/test_githubapp_webhook.py
@@ -101,6 +101,10 @@ def test_installation_created(self, sync):
                 "id": new_installation_id,
                 "target_id": 2222,
                 "target_type": GitHubAccountType.USER,
+                "repository_selection": "all",
+                "account": {
+                    "login": "user",
+                },
             },
         }
         r = self.post_webhook("installation", payload)
@@ -111,6 +115,8 @@ def test_installation_created(self, sync):
         )
         assert installation.target_id == 2222
         assert installation.target_type == GitHubAccountType.USER
+        assert installation.all_repositories_selected
+        assert installation.target_login == "user"
         sync.assert_called_once()
 
     @mock.patch.object(GitHubAppService, "sync")
@@ -121,6 +127,10 @@ def test_installation_created_with_existing_installation(self, sync):
                 "id": self.installation.installation_id,
                 "target_id": self.installation.target_id,
                 "target_type": self.installation.target_type,
+                "repository_selection": "all",
+                "account": {
+                    "login": "user",
+                },
             },
         }
         r = self.post_webhook("installation", paylod)
@@ -129,6 +139,8 @@ def test_installation_created_with_existing_installation(self, sync):
         self.installation.refresh_from_db()
         assert self.installation.target_id == 1111
         assert self.installation.target_type == GitHubAccountType.USER
+        assert self.installation.all_repositories_selected
+        assert self.installation.target_login == "user"
         assert GitHubAppInstallation.objects.count() == 1
 
     @mock.patch.object(GitHubAppService, "sync")