diff --git a/.env.example b/.env.example
index 53597282e..8f09c9218 100644
--- a/.env.example
+++ b/.env.example
@@ -142,6 +142,11 @@ ACTION_MAILBOX_SES_SNS_TOPIC=
 # Storage
 ACTIVE_STORAGE_SERVICE=local
 
+# Restrict libvips to its trusted, well-tested image loaders when Active Storage
+# generates variants. Hardens image processing against untrusted uploads.
+# Requires libvips >= 8.13 (ignored on older versions).
+VIPS_BLOCK_UNTRUSTED=1
+
 # Amazon S3
 # documentation: https://www.chatwoot.com/docs/configuring-s3-bucket-as-cloud-storage
 S3_BUCKET_NAME=
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 645a61a55..b55c5f59e 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -130,6 +130,9 @@ RUN apk update && apk add --no-cache \
   vips \
   && gem install bundler -v "$BUNDLER_VERSION"
 
+# Restrict libvips to its trusted image loaders when generating variants
+ENV VIPS_BLOCK_UNTRUSTED=1
+
 COPY --from=node /usr/local/bin/node /usr/local/bin/
 COPY --from=node /usr/local/lib/node_modules /usr/local/lib/node_modules