diff --git a/scripts/bash/create-new-feature.sh b/scripts/bash/create-new-feature.sh
index fe6d7399..640ba73c 100644
--- a/scripts/bash/create-new-feature.sh
+++ b/scripts/bash/create-new-feature.sh
@@ -246,7 +246,8 @@ if [ -z "$BRANCH_NUMBER" ]; then
     fi
 fi
 
-FEATURE_NUM=$(printf "%03d" "$BRANCH_NUMBER")
+# Force base-10 interpretation to prevent octal conversion (027 → 23)
+FEATURE_NUM=$(printf "%03d" "$((10#$BRANCH_NUMBER))")
 BRANCH_NAME="${FEATURE_NUM}-${BRANCH_SUFFIX}"
 
 # GitHub enforces a 244-byte limit on branch names