diff --git a/lib/workers/repository/process/lookup/index.ts b/lib/workers/repository/process/lookup/index.ts
index 0b97f426e5f4ed..63aae5d76c4fcc 100644
--- a/lib/workers/repository/process/lookup/index.ts
+++ b/lib/workers/repository/process/lookup/index.ts
@@ -363,6 +363,10 @@ export async function lookupUpdates(
       );
       if (config.isVulnerabilityAlert) {
         filteredReleases = filteredReleases.slice(0, 1);
+        logger.debug(
+          { filteredReleases },
+          'Vulnerability alert found: limiting results to a single release',
+        );
       }
       const buckets: Record<string, [Release]> = {};
       for (const release of filteredReleases) {