diff --git a/docker/keeper/Dockerfile b/docker/keeper/Dockerfile
index aae7fe7b524f..4a967b3e7600 100644
--- a/docker/keeper/Dockerfile
+++ b/docker/keeper/Dockerfile
@@ -1,7 +1,7 @@
 # The Dockerfile.ubuntu exists for the tests/ci/docker_server.py script
 # If the image is built from Dockerfile.alpine, then the `-alpine` suffix is added automatically,
 # so the only purpose of Dockerfile.ubuntu is to push `latest`, `head` and so on w/o suffixes
-FROM ubuntu:22.04 AS glibc-donor
+FROM ubuntu:26.04 AS glibc-donor
 ARG TARGETARCH
 
 RUN arch=${TARGETARCH:-amd64} \
diff --git a/docker/keeper/Dockerfile.distroless b/docker/keeper/Dockerfile.distroless
index 9b422b670f6a..50d819c948bc 100644
--- a/docker/keeper/Dockerfile.distroless
+++ b/docker/keeper/Dockerfile.distroless
@@ -13,7 +13,7 @@
 # ──────────────────────────────────────────────────────────────────────────────
 # Stage 1: Install ClickHouse and assemble the output directory tree.
 # ──────────────────────────────────────────────────────────────────────────────
-FROM ubuntu:22.04 AS ch-builder
+FROM ubuntu:26.04 AS ch-builder
 
 ARG DEBIAN_FRONTEND=noninteractive
 ARG apt_archive="http://archive.ubuntu.com"
diff --git a/docker/server/Dockerfile.alpine b/docker/server/Dockerfile.alpine
index 4eb936f3c8e7..623e874b2737 100644
--- a/docker/server/Dockerfile.alpine
+++ b/docker/server/Dockerfile.alpine
@@ -1,4 +1,4 @@
-FROM ubuntu:22.04 AS glibc-donor
+FROM ubuntu:26.04 AS glibc-donor
 ARG TARGETARCH
 
 RUN arch=${TARGETARCH:-amd64} \
diff --git a/docker/server/Dockerfile.distroless b/docker/server/Dockerfile.distroless
index 77f5f942409b..9825721c0eaf 100644
--- a/docker/server/Dockerfile.distroless
+++ b/docker/server/Dockerfile.distroless
@@ -13,7 +13,7 @@
 # ──────────────────────────────────────────────────────────────────────────────
 # Stage 1: Install ClickHouse and assemble the output directory tree.
 # ──────────────────────────────────────────────────────────────────────────────
-FROM ubuntu:22.04 AS ch-builder
+FROM ubuntu:26.04 AS ch-builder
 
 # see https://github.com/moby/moby/issues/4032#issuecomment-192327844
 ARG DEBIAN_FRONTEND=noninteractive
diff --git a/docker/server/Dockerfile.ubuntu b/docker/server/Dockerfile.ubuntu
index 911389e4e64f..60e0b4c9a1ff 100644
--- a/docker/server/Dockerfile.ubuntu
+++ b/docker/server/Dockerfile.ubuntu
@@ -1,4 +1,4 @@
-FROM ubuntu:22.04
+FROM ubuntu:26.04
 
 # see https://github.com/moby/moby/issues/4032#issuecomment-192327844
 # It could be removed after we move on a version 23:04+