diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index adbaf0b6..09e46ab8 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -63,6 +63,7 @@ updates:
   - package-ecosystem: "docker"
     directories:
       - "/test/e2e/otlp-sink/telemetrymatcher"
+      - "/test/e2e/dash0-api-mock"
     schedule:
       interval: "daily"
       time: "07:18"
diff --git a/images/collector/Dockerfile b/images/collector/Dockerfile
index 47747b37..ead6fd46 100644
--- a/images/collector/Dockerfile
+++ b/images/collector/Dockerfile
@@ -1,7 +1,7 @@
 # SPDX-FileCopyrightText: Copyright 2024 Dash0 Inc.
 # SPDX-License-Identifier: Apache-2.0
 
-FROM --platform=${BUILDPLATFORM} golang:1.25.5-alpine3.22 AS builder
+FROM --platform=${BUILDPLATFORM} golang:1.25.5-alpine3.23 AS builder
 
 RUN apk add --update git make yq && apk cache clean
 
diff --git a/images/configreloader/Dockerfile b/images/configreloader/Dockerfile
index 045c6fd6..66576ea8 100644
--- a/images/configreloader/Dockerfile
+++ b/images/configreloader/Dockerfile
@@ -3,7 +3,7 @@
 
 # Note: This Dockerfile expects dash0-operator/images as the build context.
 
-FROM --platform=${BUILDPLATFORM} golang:1.25.5-alpine3.22 AS builder
+FROM --platform=${BUILDPLATFORM} golang:1.25.5-alpine3.23 AS builder
 
 WORKDIR /usr/local/go/src/configreloader
 
diff --git a/images/filelogoffsetsync/Dockerfile b/images/filelogoffsetsync/Dockerfile
index 7b4302b4..90b517dd 100644
--- a/images/filelogoffsetsync/Dockerfile
+++ b/images/filelogoffsetsync/Dockerfile
@@ -3,7 +3,7 @@
 
 # Note: This Dockerfile expects dash0-operator/images as the build context.
 
-FROM --platform=${BUILDPLATFORM} golang:1.25.5-alpine3.22 AS builder
+FROM --platform=${BUILDPLATFORM} golang:1.25.5-alpine3.23 AS builder
 
 WORKDIR /usr/local/go/src/filelogoffsetsync
 
diff --git a/images/instrumentation/injector/test/scripts/test-all.sh b/images/instrumentation/injector/test/scripts/test-all.sh
index 7a5e7877..21f73dfa 100755
--- a/images/instrumentation/injector/test/scripts/test-all.sh
+++ b/images/instrumentation/injector/test/scripts/test-all.sh
@@ -199,7 +199,7 @@ for arch in "${all_architectures[@]}"; do
     if [[ "$libc_flavor" = "glibc" ]]; then
       no_environ_base_image="golang:1.25.5-trixie"
     elif [[ "$libc_flavor" = "musl" ]]; then
-      no_environ_base_image="golang:1.25.5-alpine3.22"
+      no_environ_base_image="golang:1.25.5-alpine3.23"
     fi
     echo "building the no_environ_symbol test app for CPU architecture $arch [GOARCH=$goarch] and libc flavor $libc_flavor (base image: $no_environ_base_image)"
     ARCH="$arch" \
diff --git a/images/instrumentation/test/distroless-static/Dockerfile b/images/instrumentation/test/distroless-static/Dockerfile
index dd92bb2c..baf6df53 100644
--- a/images/instrumentation/test/distroless-static/Dockerfile
+++ b/images/instrumentation/test/distroless-static/Dockerfile
@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 ARG instrumentation_image=dash0-instrumentation:latest
-ARG base_image_build=golang:1.25.5-alpine3.22
+ARG base_image_build=golang:1.25.5-alpine3.23
 ARG base_image_run=scratch
 
 FROM ${instrumentation_image} AS init
diff --git a/images/instrumentation/test/distroless-static/base-images b/images/instrumentation/test/distroless-static/base-images
index c3c21ade..b3544fb7 100644
--- a/images/instrumentation/test/distroless-static/base-images
+++ b/images/instrumentation/test/distroless-static/base-images
@@ -2,4 +2,4 @@
 # SPDX-License-Identifier: Apache-2.0
 
 # one pair of build and run base images per line
-golang:1.25.5-alpine3.22,scratch
+golang:1.25.5-alpine3.23,scratch
diff --git a/test/e2e/dash0-api-mock/Dockerfile b/test/e2e/dash0-api-mock/Dockerfile
index c3cf9804..63710c0a 100644
--- a/test/e2e/dash0-api-mock/Dockerfile
+++ b/test/e2e/dash0-api-mock/Dockerfile
@@ -1,7 +1,7 @@
 # SPDX-FileCopyrightText: Copyright 2025 Dash0 Inc.
 # SPDX-License-Identifier: Apache-2.0
 
-FROM --platform=${BUILDPLATFORM} golang:1.25.5-alpine3.22 AS builder
+FROM --platform=${BUILDPLATFORM} golang:1.25.5-alpine3.23 AS builder
 
 WORKDIR /usr/local/go/dash0_api_mock
 
diff --git a/test/e2e/otlp-sink/telemetrymatcher/Dockerfile b/test/e2e/otlp-sink/telemetrymatcher/Dockerfile
index 878d5794..52dd6119 100644
--- a/test/e2e/otlp-sink/telemetrymatcher/Dockerfile
+++ b/test/e2e/otlp-sink/telemetrymatcher/Dockerfile
@@ -3,7 +3,7 @@
 
 # Note: This Dockerfile expects test/e2e as the build context.
 
-FROM --platform=${BUILDPLATFORM} golang:1.25.5-alpine3.22 AS builder
+FROM --platform=${BUILDPLATFORM} golang:1.25.5-alpine3.23 AS builder
 
 WORKDIR /usr/local/go/src/telemetrymatcher