diff --git a/.github/workflows/install-testing.yml b/.github/workflows/install-testing.yml
index 44074c0e02b52..e445efbad1e76 100644
--- a/.github/workflows/install-testing.yml
+++ b/.github/workflows/install-testing.yml
@@ -106,11 +106,16 @@ jobs:
           - db-version: '9.4'
           - db-version: '9.5'
           - db-version: '9.6'
+          - db-version: '26.7'
           # MySQL 9.0+ will not work on PHP 7.2 & 7.3. See https://core.trac.wordpress.org/ticket/61218.
           - php: '7.2'
             db-version: '9.7'
           - php: '7.3'
             db-version: '9.7'
+          - php: '7.2'
+            db-version: '26.10'
+          - php: '7.3'
+            db-version: '26.10'
 
     services:
       database:
diff --git a/.github/workflows/local-docker-environment.yml b/.github/workflows/local-docker-environment.yml
index cf50ce28185c6..7d9329462819d 100644
--- a/.github/workflows/local-docker-environment.yml
+++ b/.github/workflows/local-docker-environment.yml
@@ -113,6 +113,7 @@ jobs:
           - db-version: '9.4'
           - db-version: '9.5'
           - db-version: '9.6'
+          - db-version: '26.7'
           # No PHP 8.5 + Memcached support yet.
           - php: '8.5'
             memcached: true
diff --git a/.github/workflows/phpunit-tests.yml b/.github/workflows/phpunit-tests.yml
index 68f24fb48d9ae..aabf75a1b47d1 100644
--- a/.github/workflows/phpunit-tests.yml
+++ b/.github/workflows/phpunit-tests.yml
@@ -412,7 +412,7 @@ jobs:
         os: [ ubuntu-24.04 ]
         php: [ '7.4', '8.0', '8.1', '8.2', '8.3', '8.4', '8.5' ]
         db-type: [ 'mysql', 'mariadb' ]
-        db-version: [ '12.1' ]
+        db-version: [ '26.10', '12.1' ]
         multisite: [ false, true ]
         memcached: [ false ]
         db-innovation: [ true ]
@@ -423,6 +423,8 @@ jobs:
 
         exclude:
           # Exclude version combinations that don't exist.
+          - db-type: 'mariadb'
+            db-version: '26.10'
           - db-type: 'mysql'
             db-version: '12.1'
           # Outside the full matrix, only the highest and lowest PHP version of each major are tested.
diff --git a/.github/workflows/upgrade-testing.yml b/.github/workflows/upgrade-testing.yml
index 2add565b4772a..7672a21a8c6d7 100644
--- a/.github/workflows/upgrade-testing.yml
+++ b/.github/workflows/upgrade-testing.yml
@@ -166,7 +166,7 @@ jobs:
         os: [ 'ubuntu-24.04' ]
         php: [ '7.4', '8.0', '8.1', '8.2', '8.3', '8.4', '8.5' ]
         db-type: [ 'mysql' ]
-        db-version: [ '5.7', '8.0', '8.4', '9.7' ]
+        db-version: [ '5.7', '8.0', '8.4', '9.7', '26.10' ]
         wp: ${{ fromJSON( needs.build-test-matrix.outputs.recent-releases ) }}
         multisite: [ false, true ]
     with:
@@ -279,7 +279,7 @@ jobs:
         os: [ 'ubuntu-24.04' ]
         php: [ '7.4' ]
         db-type: [ 'mysql' ]
-        db-version: [ '5.7', '8.0', '8.4', '9.7' ]
+        db-version: [ '5.7', '8.0', '8.4', '9.7', '26.10' ]
         wp: ${{ fromJSON( needs.build-test-matrix.outputs.oldest-wp ) }}
         multisite: [ false, true ]
     with:
diff --git a/.version-support-mysql.json b/.version-support-mysql.json
index c7bda38ff5fe9..68c6d2ac77407 100644
--- a/.version-support-mysql.json
+++ b/.version-support-mysql.json
@@ -1,5 +1,7 @@
 {
 	"7-2": [
+		"26.10",
+		"26.7",
 		"9.7",
 		"8.4",
 		"8.0",