diff --git a/launcher/src/main.rs b/launcher/src/main.rs
index 7771b9b9..27f08f92 100644
--- a/launcher/src/main.rs
+++ b/launcher/src/main.rs
@@ -433,6 +433,7 @@ fn is_allowed_guest_env_key(key: &str, egress_gateway_enabled: bool) -> bool {
         "SANDBOX_LOG_LEVEL",
         "SANDBOX_MAX_CONCURRENT_JOBS",
         "SANDBOX_MAX_FILE_SIZE",
+        "SANDBOX_MAX_INPUT_FILES",
         "SANDBOX_MAX_NESTING_DEPTH",
         "SANDBOX_MAX_OPEN_FILES",
         "SANDBOX_MAX_OUTPUT_FILES",
@@ -850,6 +851,13 @@ mod tests {
         }
     }
 
+    #[test]
+    fn guest_env_allowlist_forwards_input_file_limit_in_both_egress_modes() {
+        for egress_gateway_enabled in [false, true] {
+            assert!(is_allowed_guest_env_key("SANDBOX_MAX_INPUT_FILES", egress_gateway_enabled));
+        }
+    }
+
     #[test]
     fn guest_env_allowlist_preserves_legacy_file_server_url_only_without_egress_gateway() {
         assert!(is_allowed_guest_env_key("FILE_SERVER_URL", false));