diff --git a/.jules/sentinel.md b/.jules/sentinel.md
new file mode 100644
index 0000000..b60ff8f
--- /dev/null
+++ b/.jules/sentinel.md
@@ -0,0 +1,4 @@
+## 2024-05-15 - Insecure Temporary File Creation in Installer Script
+**Vulnerability:** Hardcoded temporary file path `/tmp/yq` used before a `sudo mv` operation, which can lead to symlink attacks or arbitrary code execution by local attackers.
+**Learning:** Hardcoding paths in world-writable directories like `/tmp` is dangerous, especially in scripts that escalate privileges (`sudo`). An attacker can exploit this predictable path before the script has a chance to secure it.
+**Prevention:** Always use securely generated random directories (e.g., `mktemp -d`) for temporary files, especially in privileged operations.
diff --git a/tools/os_installers/apt.sh b/tools/os_installers/apt.sh
index 156016b..f75f542 100644
--- a/tools/os_installers/apt.sh
+++ b/tools/os_installers/apt.sh
@@ -231,9 +231,11 @@ fi
 echo "Installing yq..."
 if ! command -v yq &> /dev/null; then
     YQ_VERSION="v4.44.6"
-    wget "https://github.com/mikefarah/yq/releases/download/${YQ_VERSION}/yq_linux_amd64" -O /tmp/yq
-    sudo mv /tmp/yq /usr/local/bin/yq
+    tmp_dir=$(mktemp -d)
+    wget "https://github.com/mikefarah/yq/releases/download/${YQ_VERSION}/yq_linux_amd64" -O "$tmp_dir/yq"
+    sudo mv "$tmp_dir/yq" /usr/local/bin/yq
     sudo chmod +x /usr/local/bin/yq
+    rm -rf "$tmp_dir"
 fi
 
 # Install lsd (LSDeluxe)