diff --git a/features/plugin.feature b/features/plugin.feature
index dfd3f3ef..07dd97db 100644
--- a/features/plugin.feature
+++ b/features/plugin.feature
@@ -1131,3 +1131,61 @@ Feature: Manage WordPress plugins
       """
       Warning: example: This update requires PHP version 100
       """
+
+  @require-wp-4.0
+  Scenario: The unavailable reason of one plugin does not leak into other plugins
+    Given a WP install
+    And a wp-content/plugins/aaa-example/aaa-example.php file:
+      """
+      <?php
+        /**
+        * Plugin Name: AAA Example Plugin
+        * Version: 1.0.0
+        * Requires at least: 3.7
+        * Tested up to: 6.7
+      """
+    And a wp-content/plugins/zzz-example/zzz-example.php file:
+      """
+      <?php
+        /**
+        * Plugin Name: ZZZ Example Plugin
+        * Version: 1.0.0
+        * Requires at least: 3.7
+        * Tested up to: 6.7
+      """
+    And that HTTP requests to https://api.wordpress.org/plugins/update-check/1.1/ will respond with:
+      """
+      HTTP/1.1 200 OK
+
+      {
+        "plugins": {
+          "aaa-example/aaa-example.php": {
+            "id": "w.org/plugins/aaa-example",
+            "slug": "aaa-example",
+            "plugin": "aaa-example/aaa-example.php",
+            "new_version": "2.0.0",
+            "requires": "3.7",
+            "tested": "6.6",
+            "requires_php": "100",
+            "requires_plugins": [],
+            "compatibility": []
+        }
+      },
+        "translations": [],
+        "no_update": []
+      }
+      """
+
+    When I run `wp plugin list --fields=name,update,update_unavailable_reason --format=csv`
+    Then STDOUT should contain:
+      """
+      aaa-example,unavailable,"This update requires PHP version 100
+      """
+    And STDOUT should contain:
+      """
+      zzz-example,none,
+      """
+    And STDOUT should not contain:
+      """
+      zzz-example,none,"
+      """
diff --git a/features/theme.feature b/features/theme.feature
index 277b28d3..ee136710 100644
--- a/features/theme.feature
+++ b/features/theme.feature
@@ -792,6 +792,64 @@ Feature: Manage WordPress themes
       Warning: example: This update requires PHP version 100
       """
 
+  Scenario: The unavailable reason of one theme does not leak into other themes
+    Given a WP install
+    And a wp-content/themes/aaa-example/style.css file:
+      """
+      /*
+      Theme Name: aaa-example
+      Version: 1.0.0
+      */
+      """
+    And a wp-content/themes/aaa-example/index.php file:
+      """
+      <?php
+      // Silence is golden.
+      """
+    And a wp-content/themes/zzz-example/style.css file:
+      """
+      /*
+      Theme Name: zzz-example
+      Version: 1.0.0
+      */
+      """
+    And a wp-content/themes/zzz-example/index.php file:
+      """
+      <?php
+      // Silence is golden.
+      """
+    And that HTTP requests to https://api.wordpress.org/themes/update-check/1.1/ will respond with:
+      """
+      HTTP/1.1 200 OK
+
+      {
+        "themes": {
+          "aaa-example": {
+            "theme": "aaa-example",
+            "new_version": "2.0.0",
+            "requires": "3.7",
+            "requires_php": "100"
+          }
+      },
+        "translations": [],
+        "no_update": []
+      }
+      """
+
+    When I run `wp theme list --fields=name,update,update_unavailable_reason --format=csv`
+    Then STDOUT should contain:
+      """
+      aaa-example,unavailable,"This update requires PHP version 100
+      """
+    And STDOUT should contain:
+      """
+      zzz-example,none,
+      """
+    And STDOUT should not contain:
+      """
+      zzz-example,none,"
+      """
+
   @require-wp-5.9
   Scenario: Check theme type field for block themes
     Given a WP install
diff --git a/src/Plugin_Command.php b/src/Plugin_Command.php
index c2e3877f..bd39dc91 100644
--- a/src/Plugin_Command.php
+++ b/src/Plugin_Command.php
@@ -987,6 +987,9 @@ protected function get_item_list() {
 			// filter out plugins based on PHP requirements -- so we must do that here
 			$compatible_php = empty( $requires_php ) || version_compare( PHP_VERSION, $requires_php, '>=' );
 
+			// Reset for each plugin so a previous plugin's reason does not leak into this row.
+			$update_unavailable_reason = '';
+
 			if ( ! $compatible_php ) {
 				$update = 'unavailable';
 
@@ -1030,7 +1033,7 @@ protected function get_item_list() {
 				'wporg_status'              => $wporg_info['status'],
 				'wporg_last_updated'        => $wporg_info['last_updated'],
 				'recently_active'           => in_array( $file, array_keys( $recently_active ), true ),
-				'update_unavailable_reason' => isset( $update_unavailable_reason ) ? $update_unavailable_reason : '',
+				'update_unavailable_reason' => $update_unavailable_reason,
 			];
 
 			if ( $this->check_headers['tested_up_to'] ) {
diff --git a/src/WP_CLI/ParseThemeNameInput.php b/src/WP_CLI/ParseThemeNameInput.php
index df46b9c8..069526af 100644
--- a/src/WP_CLI/ParseThemeNameInput.php
+++ b/src/WP_CLI/ParseThemeNameInput.php
@@ -103,6 +103,9 @@ private function get_all_themes() {
 			$compatible_php = empty( $requires_php ) || version_compare( PHP_VERSION, $requires_php, '>=' );
 			$compatible_wp  = empty( $requires ) || version_compare( $wp_version, $requires, '>=' );
 
+			// Reset for each theme so a previous theme's reason does not leak into this row.
+			$update_unavailable_reason = '';
+
 			if ( ! $compatible_php ) {
 				$update = 'unavailable';
 
@@ -155,7 +158,7 @@ private function get_all_themes() {
 				'auto_update_indicated'     => $auto_update_indicated,
 				'requires'                  => $requires,
 				'requires_php'              => $requires_php,
-				'update_unavailable_reason' => isset( $update_unavailable_reason ) ? $update_unavailable_reason : '',
+				'update_unavailable_reason' => $update_unavailable_reason,
 				'type'                      => $theme_type,
 			];