diff --git a/build.gradle b/build.gradle
index 3b91ca502c..aaeb7eb8cc 100644
--- a/build.gradle
+++ b/build.gradle
@@ -43,6 +43,17 @@ ext {
     jwtVersion = "0.13.0"
     awsSdkVersion = "2.44.12"
     testcontainersMinioVersion = "1.21.4"
+    // Security CVE overrides for Spring Boot 4 BOM-managed transitives
+    nettyVersion = "4.2.15.Final"
+    jackson2Version = "2.22.0"
+    // jackson-annotations ships 2-component versions (2.22, not 2.22.0)
+    jackson2AnnotationsVersion = "2.22"
+    // Jackson 3 (tools.jackson) used by Spring Boot 4; 3.1.4 patches CVE-2026-54512..54518
+    jackson3Version = "3.1.4"
+    postgresqlVersion = "42.7.11"
+    // velocity-engine-core 2.3 (via shib-velocity SAML stack) shades a vulnerable
+    // commons-io 2.8.0 (CVE-2024-47554) into its jar; 2.4.1 no longer shades it
+    velocityVersion = "2.4.1"
     // junit-platform-launcher version managed by Spring Boot BOM
     modernJavaVersion = 25
 }
@@ -222,10 +233,33 @@ subprojects {
         resolutionStrategy.force "org.apache.commons:commons-lang3:${commonsLang3}"
         // CVE-2024-47554: commons-io DoS prevention
         resolutionStrategy.force "commons-io:commons-io:${commonsIoVersion}"
+        // CVE-2024-47554: velocity-engine-core 2.3 shades commons-io 2.8.0; 2.4.1 unshades it
+        resolutionStrategy.force "org.apache.velocity:velocity-engine-core:${velocityVersion}"
         // Keep BouncyCastle modules aligned to avoid runtime linkage errors
         resolutionStrategy.force "org.bouncycastle:bcprov-jdk18on:${bouncycastleVersion}"
         resolutionStrategy.force "org.bouncycastle:bcpkix-jdk18on:${bouncycastleVersion}"
         resolutionStrategy.force "org.bouncycastle:bcutil-jdk18on:${bouncycastleVersion}"
+        resolutionStrategy.eachDependency { details ->
+            // Netty 4.2.x: CVE-2026-44249/45416/45673/45674/47244/47691/48043/50010/50020/50560
+            // /42579/42580/42581/42583/42584/42585/42587/41417 - force 4.2.15.Final across all modules
+            if (details.requested.group == "io.netty") {
+                details.useVersion nettyVersion
+                details.because "CVE-2026 netty fixes (>=4.2.15.Final)"
+            }
+            // Jackson 2.x: CVE-2026-54512/54513/54514/54515/54516/54517/54518 - force 2.22.0.
+            // jackson-annotations uses 2-component versions (2.22), unlike core/databind (2.22.0).
+            if (details.requested.group.startsWith("com.fasterxml.jackson")) {
+                details.useVersion(details.requested.name == "jackson-annotations"
+                    ? jackson2AnnotationsVersion : jackson2Version)
+                details.because "CVE-2026-54512..54518 jackson 2.x fixes (>=2.22.0)"
+            }
+            // Jackson 3 (tools.jackson) ships with Spring Boot 4; same CVE-2026-54512..54518
+            // family is fixed in 3.1.4 (stays in Spring Boot's 3.1.x line).
+            if (details.requested.group.startsWith("tools.jackson")) {
+                details.useVersion jackson3Version
+                details.because "CVE-2026-54512..54518 jackson 3.x fixes (>=3.1.4)"
+            }
+        }
     }
 
     dependencyManagement {
@@ -235,6 +269,8 @@ subprojects {
         dependencies {
             // Override BOM-managed commons-lang3 for CVE-2025-48924 fix
             dependency "org.apache.commons:commons-lang3:$commonsLang3"
+            // CVE-2026-42198: Spring Boot 4 BOM pins postgresql 42.7.10; override to patched 42.7.11
+            dependency "org.postgresql:postgresql:$postgresqlVersion"
         }
     }
 
diff --git a/docker/backend/Dockerfile b/docker/backend/Dockerfile
index b2b7aa644b..5ed6a240a1 100644
--- a/docker/backend/Dockerfile
+++ b/docker/backend/Dockerfile
@@ -1,6 +1,6 @@
 # Stirling-PDF backend-only image — JAR built with -PbuildWithFrontend=false, UI ships separately.
 
-ARG BASE_VERSION=1.0.2
+ARG BASE_VERSION=1.0.4
 ARG BASE_IMAGE=stirlingtools/stirling-pdf-base:${BASE_VERSION}
 
 # Stage 1: Build the Java application (backend only, no frontend)
diff --git a/docker/base/Dockerfile b/docker/base/Dockerfile
index c3a2c0d551..c36064afd7 100644
--- a/docker/base/Dockerfile
+++ b/docker/base/Dockerfile
@@ -5,7 +5,7 @@
 ARG TARGETPLATFORM
 
 # Stage 1: Build and strip Calibre
-FROM ubuntu:noble@sha256:c4a8d5503dfb2a3eb8ab5f807da5bc69a85730fb49b5cfca2330194ebcc41c7b AS calibre-build
+FROM ubuntu:noble@sha256:786a8b558f7be160c6c8c4a54f9a57274f3b4fb1491cf65146521ae77ff1dc54 AS calibre-build
 ARG TARGETPLATFORM
 ARG CALIBRE_VERSION=9.4.0
 ARG CALIBRE_STRIP_WEBENGINE=false
@@ -270,7 +270,7 @@ RUN if [ "${CALIBRE_STRIP_WEBENGINE}" = "true" ]; then \
 
 
 # Stage 2: Build Ghostscript from source
-FROM ubuntu:noble@sha256:c4a8d5503dfb2a3eb8ab5f807da5bc69a85730fb49b5cfca2330194ebcc41c7b AS gs-build
+FROM ubuntu:noble@sha256:786a8b558f7be160c6c8c4a54f9a57274f3b4fb1491cf65146521ae77ff1dc54 AS gs-build
 ARG TARGETPLATFORM
 ARG GS_VERSION=10.06.0
 
@@ -294,7 +294,7 @@ RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
 
 
 # Stage 3: Build PDF Tools (QPDF and ImageMagick 7)
-FROM ubuntu:noble@sha256:c4a8d5503dfb2a3eb8ab5f807da5bc69a85730fb49b5cfca2330194ebcc41c7b AS pdf-tools-build
+FROM ubuntu:noble@sha256:786a8b558f7be160c6c8c4a54f9a57274f3b4fb1491cf65146521ae77ff1dc54 AS pdf-tools-build
 ARG TARGETPLATFORM
 ARG QPDF_VERSION=12.3.2
 ARG IM_VERSION=7.1.2-13
@@ -339,7 +339,7 @@ RUN mkdir -p /magick-export/usr/bin \
 
 
 # Stage 4: Build Python venv
-FROM ubuntu:noble@sha256:c4a8d5503dfb2a3eb8ab5f807da5bc69a85730fb49b5cfca2330194ebcc41c7b AS python-venv-build
+FROM ubuntu:noble@sha256:786a8b558f7be160c6c8c4a54f9a57274f3b4fb1491cf65146521ae77ff1dc54 AS python-venv-build
 ARG TARGETPLATFORM
 ARG UNOSERVER_VERSION=3.6
 
@@ -352,7 +352,8 @@ RUN --mount=type=cache,target=/root/.cache/pip,sharing=locked \
     python3 -m venv /opt/venv --system-site-packages && \
     /opt/venv/bin/pip install --no-cache-dir --prefer-binary --only-binary=:all: \
       weasyprint pdf2image opencv-python-headless ocrmypdf \
-      cryptography \
+      "cryptography>=48.0.1" \
+      "lxml>=6.1.0" \
       "unoserver==${UNOSERVER_VERSION}" && \
     find /opt/venv -type d -name __pycache__ -exec rm -rf {} + 2>/dev/null || true && \
     find /opt/venv \( -name '*.pyc' -o -name '*.pyi' \) -delete 2>/dev/null || true && \
@@ -364,7 +365,7 @@ RUN --mount=type=cache,target=/root/.cache/pip,sharing=locked \
 
 
 # Final runtime image - the actual base image
-FROM eclipse-temurin:25-jre-noble@sha256:b27ca47660a8fa837e47a8533b9b1a3a430295cf29ca28d91af4fd121572dc29 AS runtime
+FROM eclipse-temurin:25-jre-noble@sha256:f9bd8815e73632c22985ebb133ec49b9fc4ad5ffe0657594ac02748ad0431ab7 AS runtime
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
@@ -382,6 +383,9 @@ RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     apt-get install -y --no-install-recommends software-properties-common; \
     add-apt-repository -y ppa:libreoffice/ppa; \
     apt-get update; \
+    # Security: upgrade base-image packages to latest noble patches (reduces deb CVEs
+    # in openssl, perl, libxml2, gnutls, cups, curl, etc. inherited from the runtime base)
+    apt-get upgrade -y; \
     apt-get install -y --no-install-recommends \
       # Core tools
       ca-certificates tzdata tini bash fontconfig curl \
diff --git a/docker/embedded/Dockerfile b/docker/embedded/Dockerfile
index 7ea8201f59..1b5d047abd 100644
--- a/docker/embedded/Dockerfile
+++ b/docker/embedded/Dockerfile
@@ -1,7 +1,7 @@
 # Stirling-PDF - Full version (embedded frontend)
 # Uses pre-built base image for fast builds
 
-ARG BASE_VERSION=1.0.2
+ARG BASE_VERSION=1.0.4
 ARG BASE_IMAGE=stirlingtools/stirling-pdf-base:${BASE_VERSION}
 
 # Stage 1: Build the Java application and frontend
@@ -55,7 +55,7 @@ RUN JPDFIUM_PLATFORM="$([ "$TARGETARCH" = arm64 ] && echo linux-arm64 || echo li
       --no-daemon
 
 # Stage 2: Extract Spring Boot Layers
-FROM eclipse-temurin:25-jre-noble@sha256:b27ca47660a8fa837e47a8533b9b1a3a430295cf29ca28d91af4fd121572dc29 AS jar-extract
+FROM eclipse-temurin:25-jre-noble@sha256:f9bd8815e73632c22985ebb133ec49b9fc4ad5ffe0657594ac02748ad0431ab7 AS jar-extract
 WORKDIR /tmp
 COPY --from=app-build /app/app/core/build/libs/*.jar app.jar
 RUN java -Djarmode=tools -jar app.jar extract --layers --destination /layers
diff --git a/docker/embedded/Dockerfile.fat b/docker/embedded/Dockerfile.fat
index 71f2a12414..0690e0b3d7 100644
--- a/docker/embedded/Dockerfile.fat
+++ b/docker/embedded/Dockerfile.fat
@@ -2,7 +2,7 @@
 # Extra fonts for air-gapped environments
 # Uses pre-built base image for fast builds
 
-ARG BASE_VERSION=1.0.2
+ARG BASE_VERSION=1.0.4
 ARG BASE_IMAGE=stirlingtools/stirling-pdf-base:${BASE_VERSION}
 
 # Stage 1: Build the Java application and frontend
diff --git a/docker/embedded/Dockerfile.ultra-lite b/docker/embedded/Dockerfile.ultra-lite
index 01048e864d..aee90094c3 100644
--- a/docker/embedded/Dockerfile.ultra-lite
+++ b/docker/embedded/Dockerfile.ultra-lite
@@ -52,7 +52,7 @@ RUN JPDFIUM_PLATFORM="$([ "$TARGETARCH" = arm64 ] && echo linux-arm64 || echo li
 
 # Stage 2: Runtime image
 # glibc base (not Alpine/musl): JPDFium's PDFium natives are glibc-linked.
-FROM eclipse-temurin:25-jre-noble@sha256:b27ca47660a8fa837e47a8533b9b1a3a430295cf29ca28d91af4fd121572dc29
+FROM eclipse-temurin:25-jre-noble@sha256:f9bd8815e73632c22985ebb133ec49b9fc4ad5ffe0657594ac02748ad0431ab7
 
 ENV DEBIAN_FRONTEND=noninteractive \
     LANG=C.UTF-8 \
@@ -96,6 +96,7 @@ ENV VERSION_TAG=$VERSION_TAG \
 RUN mkdir -p $HOME /configs /logs /customFiles /pipeline/watchedFolders /pipeline/finishedFolders /storage /tmp/stirling-pdf /tmp/stirling-pdf/heap_dumps && \
     mkdir -p /usr/share/fonts/opentype/noto && \
     apt-get update && \
+    apt-get upgrade -y && \
     apt-get install -y --no-install-recommends \
     ca-certificates \
     tzdata \