diff --git a/bitnami/rabbitmq/4.2/debian-12/Dockerfile b/bitnami/rabbitmq/4.2/debian-12/Dockerfile
index 06a278c6a5c7..4ed733dad862 100644
--- a/bitnami/rabbitmq/4.2/debian-12/Dockerfile
+++ b/bitnami/rabbitmq/4.2/debian-12/Dockerfile
@@ -7,7 +7,7 @@ ARG DOWNLOADS_URL="downloads.bitnami.com/files/stacksmith"
 ARG TARGETARCH
 
 LABEL org.opencontainers.image.base.name="docker.io/bitnami/minideb:bookworm" \
-      org.opencontainers.image.created="2025-11-17T03:39:21Z" \
+      org.opencontainers.image.created="2025-11-19T11:26:24Z" \
       org.opencontainers.image.description="Application packaged by Broadcom, Inc." \
       org.opencontainers.image.documentation="https://github.com/bitnami/containers/tree/main/bitnami/rabbitmq/README.md" \
       org.opencontainers.image.source="https://github.com/bitnami/containers/tree/main/bitnami/rabbitmq" \
@@ -54,7 +54,7 @@ COPY rootfs /
 RUN /opt/bitnami/scripts/rabbitmq/postunpack.sh
 ENV APP_VERSION="4.2.1" \
     BITNAMI_APP_NAME="rabbitmq" \
-    IMAGE_REVISION="0" \
+    IMAGE_REVISION="1" \
     LANG="en_US.UTF-8" \
     LANGUAGE="en_US:en"
 
diff --git a/bitnami/rabbitmq/4.2/debian-12/rootfs/opt/bitnami/scripts/librabbitmq.sh b/bitnami/rabbitmq/4.2/debian-12/rootfs/opt/bitnami/scripts/librabbitmq.sh
index 645ade4b1f90..3adcf999470f 100644
--- a/bitnami/rabbitmq/4.2/debian-12/rootfs/opt/bitnami/scripts/librabbitmq.sh
+++ b/bitnami/rabbitmq/4.2/debian-12/rootfs/opt/bitnami/scripts/librabbitmq.sh
@@ -282,10 +282,12 @@ rabbitmq_print_management_configuration() {
     fi
 
     # Allow access to web UI
+    # Sanitize the dots in the username (adding \) to avoid syntax errors
+    local -r sanitized_username="${RABBITMQ_USERNAME//./\\.}"
     if is_boolean_yes "$RABBITMQ_MANAGEMENT_ALLOW_WEB_ACCESS"; then
-        echo "loopback_users.${RABBITMQ_USERNAME} = false"
+        echo "loopback_users.${sanitized_username} = false"
     else
-        echo "loopback_users.${RABBITMQ_USERNAME} = true"
+        echo "loopback_users.${sanitized_username} = true"
     fi
 
     # End config file section