diff --git a/bazel/workspace0.bzl b/bazel/workspace0.bzl
index db38e4f3f13b6..b842a0e04f503 100644
--- a/bazel/workspace0.bzl
+++ b/bazel/workspace0.bzl
@@ -125,10 +125,10 @@ def gl_cpp_workspace0(name = None):
         http_archive,
         name = "googletest",
         urls = [
-            "https://github.com/google/googletest/archive/v1.17.0.tar.gz",
+            "https://github.com/google/googletest/archive/v1.18.0.tar.gz",
         ],
-        sha256 = "65fab701d9829d38cb77c14acdc431d2108bfdbf8979e40eb8ae567edf10b27c",
-        strip_prefix = "googletest-1.17.0",
+        sha256 = "6e3191c1455468b3fc35a417fb565c1c5071aee1b7e7f85e30cf48a98d37d8b5",
+        strip_prefix = "googletest-1.18.0",
     )
 
     # Load the googleapis dependency.
diff --git a/ci/cloudbuild/dockerfiles/fedora-cmake-quickstart.Dockerfile b/ci/cloudbuild/dockerfiles/fedora-cmake-quickstart.Dockerfile
index caec62146d2d3..9bb4771c0f0d5 100644
--- a/ci/cloudbuild/dockerfiles/fedora-cmake-quickstart.Dockerfile
+++ b/ci/cloudbuild/dockerfiles/fedora-cmake-quickstart.Dockerfile
@@ -115,7 +115,7 @@ RUN curl -fsSL https://github.com/abseil/abseil-cpp/archive/20250814.2.tar.gz |
     ldconfig && cd /var/tmp && rm -fr build
 
 WORKDIR /var/tmp/build
-RUN curl -fsSL https://github.com/google/googletest/archive/v1.17.0.tar.gz | \
+RUN curl -fsSL https://github.com/google/googletest/archive/v1.18.0.tar.gz | \
     tar -xzf - --strip-components=1 && \
     cmake \
       -DCMAKE_BUILD_TYPE="Release" \
diff --git a/ci/cloudbuild/dockerfiles/fedora-latest-cmake.Dockerfile b/ci/cloudbuild/dockerfiles/fedora-latest-cmake.Dockerfile
index 24ba5b3d3b5c5..0e2e3c34e6528 100644
--- a/ci/cloudbuild/dockerfiles/fedora-latest-cmake.Dockerfile
+++ b/ci/cloudbuild/dockerfiles/fedora-latest-cmake.Dockerfile
@@ -115,7 +115,7 @@ RUN curl -fsSL https://github.com/abseil/abseil-cpp/archive/20250814.2.tar.gz |
     ldconfig && cd /var/tmp && rm -fr build
 
 WORKDIR /var/tmp/build
-RUN curl -fsSL https://github.com/google/googletest/archive/v1.17.0.tar.gz | \
+RUN curl -fsSL https://github.com/google/googletest/archive/v1.18.0.tar.gz | \
     tar -xzf - --strip-components=1 && \
     cmake \
       -DCMAKE_BUILD_TYPE="Release" \
diff --git a/ci/cloudbuild/dockerfiles/fedora-latest-cxx20.Dockerfile b/ci/cloudbuild/dockerfiles/fedora-latest-cxx20.Dockerfile
index d37e3f4d07b13..1e26688274912 100644
--- a/ci/cloudbuild/dockerfiles/fedora-latest-cxx20.Dockerfile
+++ b/ci/cloudbuild/dockerfiles/fedora-latest-cxx20.Dockerfile
@@ -105,7 +105,7 @@ RUN curl -fsSL https://github.com/abseil/abseil-cpp/archive/20250814.2.tar.gz |
     cd /var/tmp && rm -fr build
 
 WORKDIR /var/tmp/build
-RUN curl -fsSL https://github.com/google/googletest/archive/v1.17.0.tar.gz | \
+RUN curl -fsSL https://github.com/google/googletest/archive/v1.18.0.tar.gz | \
     tar -xzf - --strip-components=1 && \
     cmake \
       -DCMAKE_CXX_STANDARD=20 \
diff --git a/ci/cloudbuild/dockerfiles/fedora-openssl-4.Dockerfile b/ci/cloudbuild/dockerfiles/fedora-openssl-4.Dockerfile
index 08de84bcb690c..00eb312bbac98 100644
--- a/ci/cloudbuild/dockerfiles/fedora-openssl-4.Dockerfile
+++ b/ci/cloudbuild/dockerfiles/fedora-openssl-4.Dockerfile
@@ -127,7 +127,7 @@ RUN curl -fsSL https://github.com/abseil/abseil-cpp/archive/20250814.2.tar.gz |
     ldconfig && cd /var/tmp && rm -fr build
 
 WORKDIR /var/tmp/build
-RUN curl -fsSL https://github.com/google/googletest/archive/v1.17.0.tar.gz | \
+RUN curl -fsSL https://github.com/google/googletest/archive/v1.18.0.tar.gz | \
     tar -xzf - --strip-components=1 && \
     cmake \
       -DCMAKE_BUILD_TYPE="Release" \
diff --git a/ci/cloudbuild/dockerfiles/gcc-oldest.Dockerfile b/ci/cloudbuild/dockerfiles/gcc-oldest.Dockerfile
index 28a5f9d5ed52a..57065d9fab901 100644
--- a/ci/cloudbuild/dockerfiles/gcc-oldest.Dockerfile
+++ b/ci/cloudbuild/dockerfiles/gcc-oldest.Dockerfile
@@ -61,7 +61,7 @@ RUN curl -fsSL https://github.com/google/re2/archive/2025-11-05.tar.gz | \
 # Install googletest, remove the downloaded files and the temporary artifacts
 # after a successful build to keep the image smaller (and with fewer layers)
 WORKDIR /var/tmp/build
-RUN curl -fsSL https://github.com/google/googletest/archive/v1.17.0.tar.gz | \
+RUN curl -fsSL https://github.com/google/googletest/archive/v1.18.0.tar.gz | \
     tar -xzf - --strip-components=1 && \
     cmake \
       -DCMAKE_BUILD_TYPE="Release" \
diff --git a/ci/cloudbuild/dockerfiles/ubuntu-20.04-install.Dockerfile b/ci/cloudbuild/dockerfiles/ubuntu-20.04-install.Dockerfile
index 1dfee6802feb1..3c8b97fad5027 100644
--- a/ci/cloudbuild/dockerfiles/ubuntu-20.04-install.Dockerfile
+++ b/ci/cloudbuild/dockerfiles/ubuntu-20.04-install.Dockerfile
@@ -92,7 +92,7 @@ RUN curl -fsSL https://github.com/abseil/abseil-cpp/archive/20250814.2.tar.gz |
     cd /var/tmp && rm -fr build
 
 WORKDIR /var/tmp/build/googletest
-RUN curl -fsSL https://github.com/google/googletest/archive/v1.17.0.tar.gz | \
+RUN curl -fsSL https://github.com/google/googletest/archive/v1.18.0.tar.gz | \
     tar -xzf - --strip-components=1 && \
     cmake \
       -DCMAKE_BUILD_TYPE="Release" \
diff --git a/ci/cloudbuild/dockerfiles/ubuntu-22.04-install.Dockerfile b/ci/cloudbuild/dockerfiles/ubuntu-22.04-install.Dockerfile
index 42195145e6c05..7a03b942edc69 100644
--- a/ci/cloudbuild/dockerfiles/ubuntu-22.04-install.Dockerfile
+++ b/ci/cloudbuild/dockerfiles/ubuntu-22.04-install.Dockerfile
@@ -91,7 +91,7 @@ RUN curl -fsSL https://github.com/abseil/abseil-cpp/archive/20250814.2.tar.gz |
     cd /var/tmp && rm -fr build
 
 WORKDIR /var/tmp/build/googletest
-RUN curl -fsSL https://github.com/google/googletest/archive/v1.17.0.tar.gz | \
+RUN curl -fsSL https://github.com/google/googletest/archive/v1.18.0.tar.gz | \
     tar -xzf - --strip-components=1 && \
     cmake \
       -DCMAKE_BUILD_TYPE="Release" \