diff --git a/core/modules/node/src/Plugin/views/row/Rss.php b/core/modules/node/src/Plugin/views/row/Rss.php
index ebb8b1afd2..01b5d2754f 100644
--- a/core/modules/node/src/Plugin/views/row/Rss.php
+++ b/core/modules/node/src/Plugin/views/row/Rss.php
@@ -110,12 +110,14 @@ public function render($row) {
 
     // The node gets built and modules add to or modify $node->rss_elements
     // and $node->rss_namespaces.
-
     $build_mode = $display_mode;
 
     $build = \Drupal::entityTypeManager()
       ->getViewBuilder('node')
       ->view($node, $build_mode);
+    // Add rss key to cache to differentiate this from other caches.
+    $build['#cache']['keys'][] = 'view_rss';
+
     unset($build['#theme']);
 
     if (!empty($node->rss_namespaces)) {
diff --git a/core/modules/node/tests/modules/node_test_views/test_views/views.view.test_node_article_feed.yml b/core/modules/node/tests/modules/node_test_views/test_views/views.view.test_node_article_feed.yml
new file mode 100644
index 0000000000..089e263a9d
--- /dev/null
+++ b/core/modules/node/tests/modules/node_test_views/test_views/views.view.test_node_article_feed.yml
@@ -0,0 +1,207 @@
+langcode: en
+status: true
+dependencies:
+  config:
+    - core.entity_view_mode.node.teaser
+    - node.type.article
+  module:
+    - node
+    - user
+id: test_node_article_feed
+label: 'Test Node Article Feed'
+module: views
+description: ''
+tag: ''
+base_table: node_field_data
+base_field: nid
+display:
+  default:
+    display_plugin: default
+    id: default
+    display_title: Master
+    position: 0
+    display_options:
+      access:
+        type: perm
+        options:
+          perm: 'access content'
+      cache:
+        type: tag
+        options: {  }
+      query:
+        type: views_query
+        options:
+          disable_sql_rewrite: false
+          distinct: false
+          replica: false
+          query_comment: ''
+          query_tags: {  }
+      exposed_form:
+        type: basic
+        options:
+          submit_button: Apply
+          reset_button: false
+          reset_button_label: Reset
+          exposed_sorts_label: 'Sort by'
+          expose_sort_order: true
+          sort_asc_label: Asc
+          sort_desc_label: Desc
+      pager:
+        type: mini
+        options:
+          items_per_page: 10
+          offset: 0
+          id: 0
+          total_pages: null
+          expose:
+            items_per_page: false
+            items_per_page_label: 'Items per page'
+            items_per_page_options: '5, 10, 25, 50'
+            items_per_page_options_all: false
+            items_per_page_options_all_label: '- All -'
+            offset: false
+            offset_label: Offset
+          tags:
+            previous: ‹‹
+            next: ››
+      style:
+        type: default
+        options:
+          grouping: {  }
+          row_class: ''
+          default_row_class: true
+          uses_fields: false
+      row:
+        type: fields
+        options:
+          inline: {  }
+          separator: ''
+          hide_empty: false
+          default_field_elements: true
+      fields:
+        title:
+          id: title
+          table: node_field_data
+          field: title
+          entity_type: node
+          entity_field: title
+          label: ''
+          alter:
+            alter_text: false
+            make_link: false
+            absolute: false
+            trim: false
+            word_boundary: false
+            ellipsis: false
+            strip_tags: false
+            html: false
+          hide_empty: false
+          empty_zero: false
+          settings:
+            link_to_entity: true
+          plugin_id: field
+          relationship: none
+          group_type: group
+          admin_label: ''
+          exclude: false
+          element_type: ''
+          element_class: ''
+          element_label_type: ''
+          element_label_class: ''
+          element_label_colon: true
+          element_wrapper_type: ''
+          element_wrapper_class: ''
+          element_default_classes: true
+          empty: ''
+          hide_alter_empty: true
+          click_sort_column: value
+          type: string
+          group_column: value
+          group_columns: {  }
+          group_rows: true
+          delta_limit: 0
+          delta_offset: 0
+          delta_reversed: false
+          delta_first_last: false
+          multi_type: separator
+          separator: ', '
+          field_api_classes: false
+      filters:
+        status:
+          value: '1'
+          table: node_field_data
+          field: status
+          plugin_id: boolean
+          entity_type: node
+          entity_field: status
+          id: status
+          expose:
+            operator: ''
+            operator_limit_selection: false
+            operator_list: {  }
+          group: 1
+        type:
+          id: type
+          table: node_field_data
+          field: type
+          value:
+            article: article
+          entity_type: node
+          entity_field: type
+          plugin_id: bundle
+          expose:
+            operator_limit_selection: false
+            operator_list: {  }
+      sorts:
+        created:
+          id: created
+          table: node_field_data
+          field: created
+          order: DESC
+          entity_type: node
+          entity_field: created
+          plugin_id: date
+          relationship: none
+          group_type: group
+          admin_label: ''
+          exposed: false
+          expose:
+            label: ''
+          granularity: second
+      header: {  }
+      footer: {  }
+      empty: {  }
+      relationships: {  }
+      arguments: {  }
+      display_extenders: {  }
+    cache_metadata:
+      max-age: -1
+      contexts:
+        - 'languages:language_content'
+        - 'languages:language_interface'
+        - url.query_args
+        - 'user.node_grants:view'
+        - user.permissions
+      tags: {  }
+  feed_1:
+    display_plugin: feed
+    id: feed_1
+    display_title: 'Test Feed'
+    position: 1
+    display_options:
+      display_extenders: {  }
+      row:
+        type: node_rss
+        options:
+          relationship: none
+          view_mode: teaser
+      path: test-node-article-feed
+      display_description: ''
+    cache_metadata:
+      max-age: -1
+      contexts:
+        - 'languages:language_content'
+        - 'languages:language_interface'
+        - 'user.node_grants:view'
+        - user.permissions
+      tags: {  }
diff --git a/core/modules/node/tests/src/Functional/NodeRssCacheTest.php b/core/modules/node/tests/src/Functional/NodeRssCacheTest.php
new file mode 100644
index 0000000000..9bc92cc23b
--- /dev/null
+++ b/core/modules/node/tests/src/Functional/NodeRssCacheTest.php
@@ -0,0 +1,87 @@
+<?php
+
+namespace Drupal\Tests\node\Functional;
+
+use Drupal\filter\Entity\FilterFormat;
+use Drupal\views\Tests\ViewTestData;
+
+/**
+ * Ensures that RSS render cache doesn't interfere with other caches.
+ *
+ * Create a node, render that node as a teaser in the RSS feed, ensure that
+ * the RSS teaser render doesn't contain tags from the default theme.
+ *
+ * @group node
+ */
+class NodeRssCacheTest extends NodeTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = ['node_test', 'views', 'node_test_views'];
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $testViews = ['test_node_article_feed'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected $defaultTheme = 'stable9';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp(): void {
+    parent::setUp();
+
+    ViewTestData::createTestViews(get_class($this), ['node_test_views']);
+
+    // Use bypass node access permission here, because the test class uses
+    // hook_grants_alter() to deny access to everyone on node_access
+    // queries.
+    $user = $this->drupalCreateUser([
+      'bypass node access',
+      'access content',
+      'create article content',
+    ]);
+    $this->drupalLogin($user);
+  }
+
+  /**
+   * Ensure the RSS teaser render does not interfere with default theme cache.
+   */
+  public function testNodeRssCacheContent() {
+    // Only the plain_text text format is available by default, which escapes
+    // all HTML.
+    FilterFormat::create([
+      'format' => 'full_html',
+      'name' => 'Full HTML',
+      'filters' => [],
+    ])->save();
+
+    // Create the test node.
+    $node = $this->drupalCreateNode([
+      'type' => 'article',
+      'promote' => 1,
+      'title' => 'Article Test Title',
+      'body' => [
+        'value' => '<p>Article test text.</p>',
+        'format' => 'full_html',
+      ],
+    ]);
+
+    // Render the node in the RSS feed view as a teaser.
+    $this->drupalGet('test-node-article-feed');
+
+    // Render the teaser normally.
+    $viewBuilder = $this->container->get('entity_type.manager')->getViewBuilder('node');
+    $build = $viewBuilder->view($node, 'teaser');
+    $output = $this->container->get('renderer')->renderPlain($build);
+
+    // Teaser must contain an "<article" tag from the stable9 theme.
+    $this->assertStringContainsString('<article', $output->__toString());
+  }
+
+}