diff --git a/.github/workflows/govulncheck.yaml b/.github/workflows/govulncheck.yaml
index 7e23bdb..8bbaeac 100644
--- a/.github/workflows/govulncheck.yaml
+++ b/.github/workflows/govulncheck.yaml
@@ -1,10 +1,17 @@
 # THIS FILE IS AUTOMATICALLY GENERATED. DO NOT EDIT.
 # Edit https://github.com/cert-manager/makefile-modules/blob/main/modules/go/base/.github/workflows/govulncheck.yaml instead.
 
-# Run govulncheck at midnight every night on the main branch,
-# to alert us to recent vulnerabilities which affect the Go code in this
-# project.
-name: govulncheck
+# Nightly security scan. Runs govulncheck against the Go code and, where the
+# repository builds OCI images, oci-security-scan, which uses trivy to check
+# the images for fixable vulnerabilities of severity MEDIUM, HIGH or CRITICAL.
+# Scans the default branch, the two newest release branches and the latest
+# release tag, to give early warning when a released image, or an image we are
+# about to release, contains known vulnerabilities.
+#
+# This file keeps its historic "govulncheck" name so that GitHub continues to
+# treat it as the same registered workflow (which allows workflow_dispatch on
+# any branch) and to avoid leaving stale workflow files in downstream repos.
+name: security-scan
 on:
   workflow_dispatch: {}
   schedule:
@@ -14,24 +21,69 @@ permissions:
   contents: read
 
 jobs:
-  govulncheck:
+  list-refs:
     runs-on: ubuntu-latest
 
     if: github.repository == 'cert-manager/csi-driver-spiffe'
 
+    outputs:
+      refs: ${{ steps.list-refs.outputs.refs }}
+
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
-        # Adding `fetch-depth: 0` makes sure tags are also fetched. We need
-        # the tags so `git describe` returns a valid version.
-        # see https://github.com/actions/checkout/issues/701 for extra info about this option
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with: { fetch-depth: 0 }
 
+      # Scan the branch this workflow runs on (usually the default branch),
+      # the two newest release branches, and the latest tag which is not a
+      # pre-release.
+      - id: list-refs
+        run: |
+          refs="$(
+            {
+              echo "${{ github.ref_name }}"
+              git branch --remotes --list 'origin/release-*' --format='%(refname:lstrip=3)' --sort=-version:refname \
+                | grep -E '^release-[0-9]+\.[0-9]+$' | head -n 2
+              git tag --list 'v*' --sort=-version:refname | grep -v '[-]' | head -n 1
+            } | jq --raw-input . | jq --slurp --compact-output 'map(select(. != "")) | unique'
+          )"
+          echo "refs=${refs}" >> "$GITHUB_OUTPUT"
+
+  security-scan:
+    runs-on: ubuntu-latest
+
+    needs: list-refs
+
+    strategy:
+      fail-fast: false
+      matrix:
+        ref: ${{ fromJSON(needs.list-refs.outputs.refs) }}
+
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          ref: ${{ matrix.ref }}
+          # Adding `fetch-depth: 0` makes sure tags are also fetched. We need
+          # the tags so `git describe` returns a valid version.
+          # see https://github.com/actions/checkout/issues/701 for extra info about this option
+          fetch-depth: 0
+
       - id: go-version
         run: |
           make print-go-version >> "$GITHUB_OUTPUT"
 
-      - uses: actions/setup-go@924ae3a1cded613372ab5595356fb5720e22ba16 # v6.5.0
+      - uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7.0.0
         with:
           go-version: ${{ steps.go-version.outputs.result }}
 
       - run: make verify-govulncheck
+
+      # Only repositories which build OCI images have the oci-security-scan
+      # target; older release branches and tags may not have it yet either.
+      # --keep-going so that one vulnerable image does not prevent the
+      # remaining images from being scanned and reported.
+      - run: |
+          if make --dry-run oci-security-scan >/dev/null 2>&1; then
+            make --keep-going oci-security-scan
+          else
+            echo "::notice::The oci-security-scan target does not exist on ${{ matrix.ref }}; skipping."
+          fi
diff --git a/klone.yaml b/klone.yaml
index 63ed17c..ba6fc49 100644
--- a/klone.yaml
+++ b/klone.yaml
@@ -28,9 +28,9 @@ targets:
       repo_hash: e0878ff3ab29a9d2af7b7eae8a98356ad388c931
       repo_path: modules/generate-verify
     - folder_name: go
-      repo_url: https://github.com/cert-manager/makefile-modules.git
-      repo_ref: main
-      repo_hash: e0878ff3ab29a9d2af7b7eae8a98356ad388c931
+      repo_url: https://github.com/wallrj/makefile-modules.git
+      repo_ref: oci-security-scan
+      repo_hash: 9f38f78fc9d3e9cdd00f57dc3202e82f9be2d123
       repo_path: modules/go
     - folder_name: helm
       repo_url: https://github.com/cert-manager/makefile-modules.git
@@ -58,9 +58,9 @@ targets:
       repo_hash: e0878ff3ab29a9d2af7b7eae8a98356ad388c931
       repo_path: modules/licenses
     - folder_name: oci-build
-      repo_url: https://github.com/cert-manager/makefile-modules.git
-      repo_ref: main
-      repo_hash: e0878ff3ab29a9d2af7b7eae8a98356ad388c931
+      repo_url: https://github.com/wallrj/makefile-modules.git
+      repo_ref: oci-security-scan
+      repo_hash: 9f38f78fc9d3e9cdd00f57dc3202e82f9be2d123
       repo_path: modules/oci-build
     - folder_name: oci-publish
       repo_url: https://github.com/cert-manager/makefile-modules.git
diff --git a/make/00_mod.mk b/make/00_mod.mk
index 9e969f3..88c00f5 100644
--- a/make/00_mod.mk
+++ b/make/00_mod.mk
@@ -59,6 +59,12 @@ nodedriverregistrar_image_name_source := registry.k8s.io/sig-storage/csi-node-dr
 nodedriverregistrar_image_name := quay.io/jetstack/csi-node-driver-registrar
 nodedriverregistrar_image_tag := v2.17.0
 
+# Scan the third party sidecar images which are deployed alongside the
+# csi-driver-spiffe images.
+oci_scan_extra_images := \
+	$(livenessprobe_image_name_source):$(livenessprobe_image_tag) \
+	$(nodedriverregistrar_image_name_source):$(nodedriverregistrar_image_tag)
+
 define helm_values_mutation_function
 $(YQ) \
 	'( .app.driver.livenessProbeImage._defaultReference = ":$(livenessprobe_image_tag)" ) | \
diff --git a/make/_shared/go/base/.github/workflows/govulncheck.yaml b/make/_shared/go/base/.github/workflows/govulncheck.yaml
index 9c6c2cf..bcdb388 100644
--- a/make/_shared/go/base/.github/workflows/govulncheck.yaml
+++ b/make/_shared/go/base/.github/workflows/govulncheck.yaml
@@ -1,10 +1,17 @@
 # THIS FILE IS AUTOMATICALLY GENERATED. DO NOT EDIT.
 # Edit https://github.com/cert-manager/makefile-modules/blob/main/modules/go/base/.github/workflows/govulncheck.yaml instead.
 
-# Run govulncheck at midnight every night on the main branch,
-# to alert us to recent vulnerabilities which affect the Go code in this
-# project.
-name: govulncheck
+# Nightly security scan. Runs govulncheck against the Go code and, where the
+# repository builds OCI images, oci-security-scan, which uses trivy to check
+# the images for fixable vulnerabilities of severity MEDIUM, HIGH or CRITICAL.
+# Scans the default branch, the two newest release branches and the latest
+# release tag, to give early warning when a released image, or an image we are
+# about to release, contains known vulnerabilities.
+#
+# This file keeps its historic "govulncheck" name so that GitHub continues to
+# treat it as the same registered workflow (which allows workflow_dispatch on
+# any branch) and to avoid leaving stale workflow files in downstream repos.
+name: security-scan
 on:
   workflow_dispatch: {}
   schedule:
@@ -14,24 +21,69 @@ permissions:
   contents: read
 
 jobs:
-  govulncheck:
+  list-refs:
     runs-on: ubuntu-latest
 
     if: github.repository == '{{REPLACE:GH-REPOSITORY}}'
 
+    outputs:
+      refs: ${{ steps.list-refs.outputs.refs }}
+
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
-        # Adding `fetch-depth: 0` makes sure tags are also fetched. We need
-        # the tags so `git describe` returns a valid version.
-        # see https://github.com/actions/checkout/issues/701 for extra info about this option
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with: { fetch-depth: 0 }
 
+      # Scan the branch this workflow runs on (usually the default branch),
+      # the two newest release branches, and the latest tag which is not a
+      # pre-release.
+      - id: list-refs
+        run: |
+          refs="$(
+            {
+              echo "${{ github.ref_name }}"
+              git branch --remotes --list 'origin/release-*' --format='%(refname:lstrip=3)' --sort=-version:refname \
+                | grep -E '^release-[0-9]+\.[0-9]+$' | head -n 2
+              git tag --list 'v*' --sort=-version:refname | grep -v '[-]' | head -n 1
+            } | jq --raw-input . | jq --slurp --compact-output 'map(select(. != "")) | unique'
+          )"
+          echo "refs=${refs}" >> "$GITHUB_OUTPUT"
+
+  security-scan:
+    runs-on: ubuntu-latest
+
+    needs: list-refs
+
+    strategy:
+      fail-fast: false
+      matrix:
+        ref: ${{ fromJSON(needs.list-refs.outputs.refs) }}
+
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          ref: ${{ matrix.ref }}
+          # Adding `fetch-depth: 0` makes sure tags are also fetched. We need
+          # the tags so `git describe` returns a valid version.
+          # see https://github.com/actions/checkout/issues/701 for extra info about this option
+          fetch-depth: 0
+
       - id: go-version
         run: |
           make print-go-version >> "$GITHUB_OUTPUT"
 
-      - uses: actions/setup-go@924ae3a1cded613372ab5595356fb5720e22ba16 # v6.5.0
+      - uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7.0.0
         with:
           go-version: ${{ steps.go-version.outputs.result }}
 
       - run: make verify-govulncheck
+
+      # Only repositories which build OCI images have the oci-security-scan
+      # target; older release branches and tags may not have it yet either.
+      # --keep-going so that one vulnerable image does not prevent the
+      # remaining images from being scanned and reported.
+      - run: |
+          if make --dry-run oci-security-scan >/dev/null 2>&1; then
+            make --keep-going oci-security-scan
+          else
+            echo "::notice::The oci-security-scan target does not exist on ${{ matrix.ref }}; skipping."
+          fi
diff --git a/make/_shared/oci-build/00_mod.mk b/make/_shared/oci-build/00_mod.mk
index 71a444e..ab5d4b4 100644
--- a/make/_shared/oci-build/00_mod.mk
+++ b/make/_shared/oci-build/00_mod.mk
@@ -32,6 +32,22 @@ CGO_ENABLED ?= 0
 GOEXPERIMENT ?=  # empty by default
 oci_platforms ?= linux/amd64,linux/arm/v7,linux/arm64,linux/ppc64le
 
+# Extra images (e.g. third party sidecar images which are deployed alongside
+# the images built by this repository) to be scanned by oci-security-scan,
+# for example:
+#   oci_scan_extra_images := registry.k8s.io/sig-storage/livenessprobe:v2.18.0
+oci_scan_extra_images ?=
+
+# The trivy policy applied by the oci-scan-* targets: report only
+# vulnerabilities which have a known fix and a severity of MEDIUM, HIGH or
+# CRITICAL, and fail if any are found. The secret scanner is disabled because
+# it is slow.
+trivy_scan_flags ?= \
+	--scanners vuln \
+	--severity MEDIUM,HIGH,CRITICAL \
+	--ignore-unfixed \
+	--exit-code 1
+
 # Default variables per build_names entry
 #
 # $1 - build_name
@@ -120,10 +136,12 @@ $(foreach build_name,$(build_names),$(eval $(call check_per_build_variables,$(bu
 # - oci-build-$(build_name)__local = build the oci directory (local arch: linux/$(HOST_ARCH))
 # - oci-load-$(build_name) = load the image into docker using the oci_$(build_name)_image_name_development variable
 # - docker-tarball-$(build_name) = build a "docker load" compatible tarball of the image
+# - oci-scan-$(build_name) = scan the image for known vulnerabilities using trivy
 oci_build_targets := $(build_names:%=oci-build-%)
 oci_build_targets += $(build_names:%=oci-build-%__local)
 oci_load_targets := $(build_names:%=oci-load-%)
 docker_tarball_targets := $(build_names:%=docker-tarball-%)
+oci_scan_targets := $(build_names:%=oci-scan-%)
 
 # Derive config based on user config
 # 
diff --git a/make/_shared/oci-build/01_mod.mk b/make/_shared/oci-build/01_mod.mk
index 026e46b..494bf4c 100644
--- a/make/_shared/oci-build/01_mod.mk
+++ b/make/_shared/oci-build/01_mod.mk
@@ -81,3 +81,59 @@ endif
 .PHONY: $(docker_tarball_targets)
 $(docker_tarball_targets): docker-tarball-%: oci-build-%__local | $(NEEDS_GO) $(NEEDS_IMAGE-TOOL)
 	$(IMAGE-TOOL) convert-to-docker-tar $(CURDIR)/$(oci_layout_path_$*).local $(docker_tarball_path_$*) $(oci_$*_image_name_development):$(oci_$*_image_tag)
+
+# Run "trivy image $2 $(trivy_scan_flags)" and print the report to stdout.
+# When running in GitHub Actions (detected by GITHUB_STEP_SUMMARY being set;
+# some repos using this module run CI on GitLab instead) the report is also
+# appended to the job summary under the heading $1, because trivy's table
+# format is hard to read in the raw job log.
+#
+# $1 - summary heading
+# $2 - trivy image arguments (an image reference or --input <tarball>)
+define trivy_scan
+report=$$(mktemp); \
+$(TRIVY) image $2 $(trivy_scan_flags) --output $$report; \
+code=$$?; \
+cat $$report; \
+if [ -n "$${GITHUB_STEP_SUMMARY:-}" ]; then \
+	{ echo "### $1"; echo '```'; cat $$report; echo '```'; echo; } >> "$$GITHUB_STEP_SUMMARY"; \
+fi; \
+rm -f $$report; \
+exit $$code
+endef
+
+.PHONY: $(oci_scan_targets)
+## Scan the OCI image (local architecture) for OS and library
+## vulnerabilities which have a known fix and a severity of
+## MEDIUM, HIGH or CRITICAL, using trivy
+## (https://github.com/aquasecurity/trivy).
+## @category [shared] Build
+$(oci_scan_targets): oci-scan-%: docker-tarball-% | $(NEEDS_TRIVY)
+	@echo "Scanning $(oci_$*_image_name_development):$(oci_$*_image_tag)"
+	@$(call trivy_scan,$(oci_$*_image_name_development):$(oci_$*_image_tag),--input $(docker_tarball_path_$*))
+
+.PHONY: oci-scan-extra-images
+## Scan the images listed in oci_scan_extra_images (e.g. third party sidecar
+## images which are deployed alongside the images built by this repository)
+## for known vulnerabilities, using trivy.
+## @category [shared] Build
+oci-scan-extra-images: | $(NEEDS_TRIVY)
+	@failed=0; \
+	for image in $(oci_scan_extra_images); do \
+		echo "Scanning $$image"; \
+		report=$$(mktemp); \
+		$(TRIVY) image $$image $(trivy_scan_flags) --output $$report || failed=1; \
+		cat $$report; \
+		if [ -n "$${GITHUB_STEP_SUMMARY:-}" ]; then \
+			{ echo "### $$image"; echo '```'; cat $$report; echo '```'; echo; } >> "$$GITHUB_STEP_SUMMARY"; \
+		fi; \
+		rm -f $$report; \
+	done; \
+	exit $$failed
+
+.PHONY: oci-security-scan
+## Scan all the OCI images built by this repository, and any extra images
+## listed in oci_scan_extra_images, for known vulnerabilities; failing if any
+## fixable vulnerabilities of severity MEDIUM, HIGH or CRITICAL are found.
+## @category [shared] Build
+oci-security-scan: $(oci_scan_targets) oci-scan-extra-images