diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3aff72840..41fe23238 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -29,6 +29,7 @@ All notable changes to this project will be documented in this file.
   This uses a git mirror and patchable instead of sourcing from Nexus.
 - superset: Bump statsd_exporter to `0.30.0` ([#1524]).
 - hadoop: Refactor cloud library provisioning to downstream images. The jars are now conveniently placed in `/stackable/hadoop-cloud-libraries/` to be easily picked up ([#1511]).
+- spark: bump hadoop `3.4.2` to `3.4.3` ([#1533])
 
 ### Fixed
 
@@ -68,8 +69,9 @@ All notable changes to this project will be documented in this file.
 [#1519]: https://github.com/stackabletech/docker-images/pull/1519
 [#1520]: https://github.com/stackabletech/docker-images/pull/1520
 [#1521]: https://github.com/stackabletech/docker-images/pull/1521
-[#1525]: https://github.com/stackabletech/docker-images/pull/1525
 [#1524]: https://github.com/stackabletech/docker-images/pull/1524
+[#1525]: https://github.com/stackabletech/docker-images/pull/1525
+[#1533]: https://github.com/stackabletech/docker-images/pull/1533
 
 ## [26.3.0] - 2026-03-16
 
diff --git a/hadoop/hadoop/Dockerfile b/hadoop/hadoop/Dockerfile
index fe6429eee..b8387410e 100644
--- a/hadoop/hadoop/Dockerfile
+++ b/hadoop/hadoop/Dockerfile
@@ -10,6 +10,7 @@ ARG PROTOBUF_VERSION
 ARG AWS_JAVA_SDK_BUNDLE_VERSION
 ARG AZURE_STORAGE_VERSION
 ARG AZURE_KEYVAULT_CORE_VERSION
+ARG ANALYTICSACCELERATOR_S3_VERSION
 ARG STACKABLE_USER_UID
 
 WORKDIR /stackable
@@ -166,6 +167,8 @@ else
     cp /stackable/hadoop/share/hadoop/common/lib/hadoop-aws-${NEW_VERSION}.jar /stackable/hadoop-cloud-libraries/
     # Starting with Hadoop 3.4.3 the aws-java-sdk-bundle is not included any more.
     curl -o /stackable/hadoop-cloud-libraries/aws-java-sdk-bundle-${AWS_JAVA_SDK_BUNDLE_VERSION}.jar --fail "https://repo.stackable.tech/repository/packages/aws/aws-java-sdk-bundle-${AWS_JAVA_SDK_BUNDLE_VERSION}.jar"
+    # Starting with Hadoop 3.4.3 the S3A InputStreamType factory references analyticsaccelerator-s3 (software.amazon.s3.analyticsaccelerator.request.ObjectClient) during S3AFileSystem.initialize.
+    curl -o /stackable/hadoop-cloud-libraries/analyticsaccelerator-s3-${ANALYTICSACCELERATOR_S3_VERSION}.jar --fail "https://repo.stackable.tech/repository/packages/aws/analyticsaccelerator-s3-${ANALYTICSACCELERATOR_S3_VERSION}.jar"
     cp /stackable/hadoop/share/hadoop/common/lib/hadoop-azure-${NEW_VERSION}.jar /stackable/hadoop-cloud-libraries/
     cp /stackable/hadoop/share/hadoop/common/lib/azure-storage-${AZURE_STORAGE_VERSION}.jar /stackable/hadoop-cloud-libraries/
     cp /stackable/hadoop/share/hadoop/common/lib/azure-keyvault-core-${AZURE_KEYVAULT_CORE_VERSION}.jar /stackable/hadoop-cloud-libraries/
diff --git a/hadoop/hadoop/boil-config.toml b/hadoop/hadoop/boil-config.toml
index b6d0ee3b9..9b2cdea1c 100644
--- a/hadoop/hadoop/boil-config.toml
+++ b/hadoop/hadoop/boil-config.toml
@@ -30,6 +30,7 @@ protobuf-version = "3.21.12" # https://github.com/apache/hadoop/blob/rel/release
 aws-java-sdk-bundle-version = "2.35.4"    # Needs to match https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-aws/3.4.3
 azure-storage-version = "7.0.1"           # Needs to match https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-azure/3.4.3
 azure-keyvault-core-version = "1.0.0"     # Needs to match https://mvnrepository.com/artifact/com.microsoft.azure/azure-storage/7.0.1
+analyticsaccelerator-s3-version = "1.3.1" # Needs to match https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-aws/3.4.3
 
 
 
@@ -42,3 +43,4 @@ protobuf-version = "3.25.5" # https://github.com/apache/hadoop/blob/rel/release-
 aws-java-sdk-bundle-version = "2.35.4"    # Needs to match https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-aws/3.5.0
 azure-storage-version = "7.0.1"           # Needs to match https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-azure/3.5.0
 azure-keyvault-core-version = "1.0.0"     # Needs to match https://mvnrepository.com/artifact/com.microsoft.azure/azure-storage/7.0.1
+analyticsaccelerator-s3-version = "1.3.1" # Needs to match https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-aws/3.4.3
diff --git a/spark-k8s/boil-config.toml b/spark-k8s/boil-config.toml
index 712c5a28f..5aa25fff4 100644
--- a/spark-k8s/boil-config.toml
+++ b/spark-k8s/boil-config.toml
@@ -6,7 +6,7 @@
 containerfile = "Dockerfile.3"
 
 [versions."3.5.8".local-images]
-"hadoop/hadoop" = "3.4.2" # TODO: Bump to 3.4.3
+"hadoop/hadoop" = "3.4.3"
 java-base = "17"
 java-devel = "17"
 hbase = "2.6.3"
@@ -22,19 +22,20 @@ tini-version = "0.19.0"
 hbase-connector-version = "1.0.1_3.5.8"
 
 
+
 # LTS since 26.7.0
 [versions."4.1.1"]
 containerfile = "Dockerfile.4"
 
 [versions."4.1.1".local-images]
-"hadoop/hadoop" = "3.4.2" # TODO: Bump to 3.4.3
+"hadoop/hadoop" = "3.4.3"
 java-base = "21"
 java-devel = "21"
 
 [versions."4.1.1".build-arguments]
 python-version = "3.12"
-jackson-dataformat-xml-version = "2.15.2" # Needs to match https://mvnrepository.com/artifact/org.apache.spark/spark-core_2.12/3.5.7
-stax2-api-version = "4.2.1"               # Needs to match https://mvnrepository.com/artifact/com.fasterxml.jackson.dataformat/jackson-dataformat-xml/2.15.2
-woodstox-core-version = "6.5.1"           # Needs to match https://mvnrepository.com/artifact/com.fasterxml.jackson.dataformat/jackson-dataformat-xml/2.15.2
+jackson-dataformat-xml-version = "2.20.0" # Needs to match https://mvnrepository.com/artifact/org.apache.spark/spark-parent_2.13/4.1.1
+stax2-api-version = "4.2.2"               # Needs to match https://mvnrepository.com/artifact/com.fasterxml.jackson.dataformat/jackson-dataformat-xml/2.20.0
+woodstox-core-version = "7.1.1"           # Needs to match https://mvnrepository.com/artifact/com.fasterxml.jackson.dataformat/jackson-dataformat-xml/2.20.0
 jmx-exporter-version = "1.3.0"
 tini-version = "0.19.0"