diff --git a/.github/workflows/integration_test_app.yaml b/.github/workflows/integration_test_app.yaml
index 089ee6a5..c81933f3 100644
--- a/.github/workflows/integration_test_app.yaml
+++ b/.github/workflows/integration_test_app.yaml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        image: [focal, jammy, noble]
+        image: [focal, jammy, noble, resolute]
         arch: [amd64, arm64, s390x, ppc64le]
         exclude:
           - image: focal
@@ -27,6 +27,12 @@ jobs:
             arch: ppc64le
           - image: jammy
             arch: s390x
+          - image: resolute
+            arch: arm64
+          - image: resolute
+            arch: ppc64le
+          - image: resolute
+            arch: s390x
     steps:
       - uses: actions/checkout@v6.0.2
       - uses: canonical/setup-lxd@v0.1.3
diff --git a/app/src/github_runner_image_builder/config.py b/app/src/github_runner_image_builder/config.py
index 23802f0d..579fe295 100644
--- a/app/src/github_runner_image_builder/config.py
+++ b/app/src/github_runner_image_builder/config.py
@@ -52,14 +52,16 @@ class BaseImage(str, Enum):
         FOCAL: The focal ubuntu LTS image.
         JAMMY: The jammy ubuntu LTS image.
         NOBLE: The noble ubuntu LTS image.
+        RESOLUTE: The resolute ubuntu LTS image.
     """
 
     FOCAL = "focal"
     JAMMY = "jammy"
     NOBLE = "noble"
+    RESOLUTE = "resolute"
 
     @classmethod
-    def get_version(cls, base: "BaseImage") -> Literal["20.04", "22.04", "24.04"]:
+    def get_version(cls, base: "BaseImage") -> Literal["20.04", "22.04", "24.04", "26.04"]:
         """Change the codename to version tag.
 
         Args:
@@ -75,6 +77,8 @@ def get_version(cls, base: "BaseImage") -> Literal["20.04", "22.04", "24.04"]:
                 return "22.04"
             case BaseImage.NOBLE:
                 return "24.04"
+            case BaseImage.RESOLUTE:
+                return "26.04"
 
     @classmethod
     def from_str(cls, tag_or_name: str) -> "BaseImage":
@@ -95,6 +99,7 @@ def from_str(cls, tag_or_name: str) -> "BaseImage":
     "20.04": BaseImage.FOCAL.value,
     "22.04": BaseImage.JAMMY.value,
     "24.04": BaseImage.NOBLE.value,
+    "26.04": BaseImage.RESOLUTE.value,
 }
 BASE_CHOICES = tuple(
     itertools.chain.from_iterable((tag, name) for (tag, name) in LTS_IMAGE_VERSION_TAG_MAP.items())
diff --git a/app/src/github_runner_image_builder/openstack_builder.py b/app/src/github_runner_image_builder/openstack_builder.py
index c94743c4..36cc7f63 100644
--- a/app/src/github_runner_image_builder/openstack_builder.py
+++ b/app/src/github_runner_image_builder/openstack_builder.py
@@ -145,6 +145,10 @@ def initialize(arch: Arch, cloud_name: str, prefix: str) -> None:
     noble_image_path = cloud_image.download_and_validate_image(
         arch=arch, base_image=BaseImage.NOBLE, release_date=noble_release_date
     )
+    logger.info("Downloading Resolute image.")
+    resolute_image_path = cloud_image.download_and_validate_image(
+        arch=arch, base_image=BaseImage.RESOLUTE
+    )
     logger.info("Uploading Focal image.")
     store.upload_image(
         arch=arch,
@@ -169,7 +173,14 @@ def initialize(arch: Arch, cloud_name: str, prefix: str) -> None:
         image_path=noble_image_path,
         keep_revisions=1,
     )
-
+    logger.info("Uploading Resolute image.")
+    store.upload_image(
+        arch=arch,
+        cloud_name=cloud_name,
+        image_name=_get_base_image_name(arch=arch, base=BaseImage.RESOLUTE, prefix=prefix),
+        image_path=resolute_image_path,
+        keep_revisions=1,
+    )
     with openstack.connect(cloud=cloud_name) as conn:
         _create_keypair(conn=conn, prefix=prefix)
         logger.info("Creating security group %s.", SHARED_SECURITY_GROUP_NAME)
@@ -600,7 +611,9 @@ def _wait_for_cloud_init_complete(
 
 
 def _execute_external_script(
-    script_url: str, script_secrets: dict[str, str], ssh_conn: fabric.Connection
+    script_url: str,
+    script_secrets: dict[str, str],
+    ssh_conn: fabric.Connection,
 ) -> None:
     """Execute the external script on the OpenStack instance.
 
@@ -679,7 +692,7 @@ def _get_ssh_connection(
     """Get a valid SSH connection to OpenStack instance.
 
     Args:
-        conn: The Openstach connection instance.
+        conn: The OpenStack connection instance.
         server: The OpenStack server instance to check if cloud_init is complete.
         ssh_key: The key to SSH RSA key to connect to the OpenStack server instance.
 
@@ -710,6 +723,7 @@ def _get_ssh_connection(
                 user="ubuntu",
                 connect_kwargs={"key_filename": str(ssh_key)},
                 connect_timeout=SSH_CONNECT_TIMEOUT,
+                inline_ssh_env=True,
             )
             result: fabric.Result | None = connection.run(
                 "echo hello world", warn=True, timeout=SSH_TEST_COMMAND_TIMEOUT
diff --git a/app/src/github_runner_image_builder/templates/cloud-init.sh.j2 b/app/src/github_runner_image_builder/templates/cloud-init.sh.j2
index f13fe4b4..2b4ebcfa 100644
--- a/app/src/github_runner_image_builder/templates/cloud-init.sh.j2
+++ b/app/src/github_runner_image_builder/templates/cloud-init.sh.j2
@@ -72,8 +72,11 @@ function install_apt_packages() {
     DEBIAN_FRONTEND=noninteractive /usr/bin/apt-get upgrade -y
     echo "Installing apt packages $packages"
     DEBIAN_FRONTEND=noninteractive /usr/bin/apt-get install -y --no-install-recommends ${packages}
-    echo "Installing linux-generic-hwe-${hwe_version}"
-    DEBIAN_FRONTEND=noninteractive /usr/bin/apt-get install -y --install-recommends linux-generic-hwe-${hwe_version}
+    # Skip installing the HWE kernel package on resolute since there is no HWE kernel for it.
+    if [ $RELEASE != "resolute" ]; then
+        echo "Installing linux-generic-hwe-${hwe_version}"
+        DEBIAN_FRONTEND=noninteractive /usr/bin/apt-get install -y --install-recommends linux-generic-hwe-${hwe_version}
+    fi
 }
 
 function disable_unattended_upgrades() {
@@ -88,6 +91,7 @@ function disable_unattended_upgrades() {
 function enable_network_fair_queuing_congestion() {
     /usr/bin/cat <<EOF | /usr/bin/sudo /usr/bin/tee -a /etc/sysctl.conf
 net.core.default_qdisc=fq
+# 26.04 does not support bbr by default, this will have no effect on 26.04.
 net.ipv4.tcp_congestion_control=bbr
 EOF
     /usr/sbin/sysctl -p
diff --git a/app/tests/integration/commands.py b/app/tests/integration/commands.py
index 112f9b82..9b327140 100644
--- a/app/tests/integration/commands.py
+++ b/app/tests/integration/commands.py
@@ -59,9 +59,10 @@ class Commands:
     Commands(
         name="test sctp support", command="sudo apt-get install lksctp-tools -yq && checksctp"
     ),
+    # Exclude 26.04 from HWE kernel test since there is no HWE kernel for it.
     Commands(
-        name="test that HWE kernel is installed",
-        command="uname -a | "
+        name="test that HWE kernel is installed  (only for non-resolute)",
+        command="lsb_release -r | grep 26.04 || uname -a | "
         "grep $(dpkg -l | grep linux-generic-hwe | awk '{print $3}' | cut -d'.' -f1-3)",
     ),
     Commands(
@@ -69,8 +70,9 @@ class Commands:
         command="sudo sysctl -a | grep 'net.core.default_qdisc = fq'",
     ),
     Commands(
-        name="test network congestion policy",
-        command="sudo sysctl -a | grep 'net.ipv4.tcp_congestion_control = bbr'",
+        name="test network congestion policy (only for non-resolute)",
+        command="lsb_release -r | grep 26.04 || "
+        "sudo sysctl -a | grep 'net.ipv4.tcp_congestion_control = bbr'",
     ),
     Commands(
         name="test external script",
@@ -78,44 +80,48 @@ class Commands:
     ),
     Commands(
         name="test external script secrets (should exist)",
-        command='grep -q "SHOULD_EXIST" secret.txt',
+        command='grep -q "EXIST" /home/ubuntu/secret.txt',
     ),
     Commands(
         name="test external script secrets (should not exist)",
-        command='! grep -q "SHOULD_NOT_EXIST" secret.txt',
+        command='! grep -q "MISSING" /home/ubuntu/secret.txt',
     ),
     # following commands are security related - ensure no traces of the external script are
     # kept in the image
     Commands(
         name="journal does not contain external script secrets",
-        command="! journalctl | grep 'SHOULD_EXIST'",
+        command="! journalctl | grep 'EXIST'",
     ),
     Commands(
         name="journal does not contain external script secrets",
-        command="! journalctl | grep 'SHOULD_NOT_EXIST'",
+        command="! journalctl | grep 'MISSING'",
     ),
+    # The sudo-rs in 26.04 cannot be disabled with "Defaults !syslog".
     Commands(
-        name="journal does not contain external script url",
-        command=f"! journalctl | grep '{TESTDATA_TEST_SCRIPT_URL}'",
+        name="journal does not contain external script url (only for non-resolute)",
+        command=f"lsb_release -r | grep 26.04 || ! journalctl | grep '{TESTDATA_TEST_SCRIPT_URL}'",
     ),
     Commands(
-        name="journal does not contain script content",
-        command="! journalctl | grep '/home/ubuntu/secret.txt'",
+        name="journal does not contain script content (only for non-resolute)",
+        command="lsb_release -r | grep 26.04 || ! journalctl | grep '/home/ubuntu/secret.txt'",
     ),
     Commands(
         name="/var/log/auth.logs does not contain external script secrets",
-        command="! grep 'SHOULD_EXIST' /var/log/auth.log*",
+        command="! grep 'EXIST' /var/log/auth.log*",
     ),
     Commands(
         name="/var/log/auth.logs does not contain external script secrets",
-        command="! grep 'SHOULD_NOT_EXIST' /var/log/auth.log*",
+        command="! grep 'MISSING' /var/log/auth.log*",
     ),
+    # The sudo-rs in 26.04 cannot be disabled with "Defaults !syslog".
     Commands(
         name="/var/log/auth.logs does not contain external script url",
-        command=f"! grep '{TESTDATA_TEST_SCRIPT_URL}' /var/log/auth.log*",
+        command="lsb_release -r | grep 26.04 || "
+        f"! grep '{TESTDATA_TEST_SCRIPT_URL}' /var/log/auth.log*",
     ),
     Commands(
         name="/var/log/auth.logs does not contain script content",
-        command="! grep '/home/ubuntu/secret.txt' /var/log/auth.log*",
+        command="lsb_release -r | grep 26.04 || "
+        "! grep '/home/ubuntu/secret.txt' /var/log/auth.log*",
     ),
 )
diff --git a/app/tests/integration/helpers.py b/app/tests/integration/helpers.py
index 38f11a49..4438fadc 100644
--- a/app/tests/integration/helpers.py
+++ b/app/tests/integration/helpers.py
@@ -39,7 +39,7 @@
 
 TESTDATA_TEST_SCRIPT_URL = (
     "https://raw.githubusercontent.com/canonical/github-runner-image-builder-operator/"
-    "cc9d06c43a5feabd278265ab580eca14d5acffd4/app/tests/integration/testdata/test_script.sh"
+    "be135aa505b37aae29aec0ab13805909c46b7903/app/tests/integration/testdata/test_script.sh"
 )
 
 
@@ -114,7 +114,7 @@ def create_lxd_vm_image(
     return lxd_image
 
 
-IMAGE_TO_TAG = {"focal": "20.04", "jammy": "22.04", "noble": "24.04"}
+IMAGE_TO_TAG = {"focal": "20.04", "jammy": "22.04", "noble": "24.04", "resolute": "26.04"}
 
 
 def _create_metadata_tar_gz(image: str, tmp_path: Path) -> Path:
diff --git a/app/tests/integration/test_openstack_builder.py b/app/tests/integration/test_openstack_builder.py
index 078ca204..29f2bc40 100644
--- a/app/tests/integration/test_openstack_builder.py
+++ b/app/tests/integration/test_openstack_builder.py
@@ -120,8 +120,8 @@ def image_ids_fixture(
                 script_config=config.ScriptConfig(
                     script_url=urllib.parse.urlparse(TESTDATA_TEST_SCRIPT_URL),
                     script_secrets={
-                        "TEST_SECRET": "SHOULD_EXIST",  # nosec: hardcoded_password_string
-                        "TEST_NON_SECRET": "SHOULD_NOT_EXIST",  # nosec: hardcoded_password_string
+                        "SECRET": "EXIST",  # nosec: hardcoded_password_string
+                        "NOEXIST": "MISSING",  # nosec: hardcoded_password_string
                     },
                 ),
             ),
diff --git a/app/tests/integration/testdata/test_script.sh b/app/tests/integration/testdata/test_script.sh
index 0fbf17ab..bfde83a6 100644
--- a/app/tests/integration/testdata/test_script.sh
+++ b/app/tests/integration/testdata/test_script.sh
@@ -1,4 +1,8 @@
 #!/bin/bash
 
+# This script is not directly used in the integration tests.
+# Modify the TESTDATA_TEST_SCRIPT_URL variable in the test code to point to this script on GitHub 
+# to change the script in the test.
+
 sudo -H -u ubuntu bash -c 'echo "hello world" > /home/ubuntu/test.txt'
-sudo -HE -u ubuntu bash -c  'echo "$TEST_SECRET" > /home/ubuntu/secret.txt'
+sudo -H --preserve-env=SECRET -u ubuntu bash -c 'echo "$SECRET" > /home/ubuntu/secret.txt'
diff --git a/app/tests/unit/test_config.py b/app/tests/unit/test_config.py
index d3c646a7..dac4243d 100644
--- a/app/tests/unit/test_config.py
+++ b/app/tests/unit/test_config.py
@@ -75,6 +75,7 @@ def test_base_image(image: str, expected_base_image: BaseImage):
         pytest.param(BaseImage.FOCAL, "20.04", id="focal"),
         pytest.param(BaseImage.JAMMY, "22.04", id="jammy"),
         pytest.param(BaseImage.NOBLE, "24.04", id="noble"),
+        pytest.param(BaseImage.RESOLUTE, "26.04", id="resolute"),
         pytest.param(None, None, id="None"),
     ],
 )
diff --git a/app/tests/unit/test_openstack_builder.py b/app/tests/unit/test_openstack_builder.py
index 2a1278e2..97350053 100644
--- a/app/tests/unit/test_openstack_builder.py
+++ b/app/tests/unit/test_openstack_builder.py
@@ -783,8 +783,11 @@ def test__generate_cloud_init_script(
     DEBIAN_FRONTEND=noninteractive /usr/bin/apt-get upgrade -y
     echo "Installing apt packages $packages"
     DEBIAN_FRONTEND=noninteractive /usr/bin/apt-get install -y --no-install-recommends ${{packages}}
-    echo "Installing linux-generic-hwe-${{hwe_version}}"
-    DEBIAN_FRONTEND=noninteractive /usr/bin/apt-get install -y --install-recommends linux-generic-hwe-${{hwe_version}}
+    # Skip installing the HWE kernel package on resolute since there is no HWE kernel for it.
+    if [ $RELEASE != "resolute" ]; then
+        echo "Installing linux-generic-hwe-${{hwe_version}}"
+        DEBIAN_FRONTEND=noninteractive /usr/bin/apt-get install -y --install-recommends linux-generic-hwe-${{hwe_version}}
+    fi
 }}
 
 function disable_unattended_upgrades() {{
@@ -799,6 +802,7 @@ def test__generate_cloud_init_script(
 function enable_network_fair_queuing_congestion() {{
     /usr/bin/cat <<EOF | /usr/bin/sudo /usr/bin/tee -a /etc/sysctl.conf
 net.core.default_qdisc=fq
+# 26.04 does not support bbr by default, this will have no effect on 26.04.
 net.ipv4.tcp_congestion_control=bbr
 EOF
     /usr/sbin/sysctl -p
diff --git a/charmcraft.yaml b/charmcraft.yaml
index 24f29948..56824386 100644
--- a/charmcraft.yaml
+++ b/charmcraft.yaml
@@ -82,7 +82,7 @@ config:
       description: |
         The base ubuntu OS image to use for the runners. Codename (e.g. "noble") or version tag
         (e.g. 24.04) is supported as input. Currently only supports LTS versions of focal and
-        higher, i.e. focal, jammy, noble.
+        higher, i.e. focal, jammy, noble, resolute.
     build-flavor:
       type: string
       default: ""
diff --git a/src/state.py b/src/state.py
index b2cc2aeb..0cc369cd 100644
--- a/src/state.py
+++ b/src/state.py
@@ -21,7 +21,12 @@
 ARCHITECTURES_PPC64LE = {"ppc64le", "ppc64el"}
 ARCHITECTURES_X86 = {"x86_64", "amd64", "x64"}
 CLOUD_NAME = "builder"
-LTS_IMAGE_VERSION_TAG_MAP = {"20.04": "focal", "22.04": "jammy", "24.04": "noble"}
+LTS_IMAGE_VERSION_TAG_MAP = {
+    "20.04": "focal",
+    "22.04": "jammy",
+    "24.04": "noble",
+    "26.04": "resolute",
+}
 
 ARCHITECTURE_CONFIG_NAME = "architecture"
 BASE_IMAGE_CONFIG_NAME = "base-image"