From 89619c7e65d8ee67b8e0bfdd60f86618b36e8dd0 Mon Sep 17 00:00:00 2001
From: Kushan20070126 <k14922160@gmail.com>
Date: Wed, 22 Apr 2026 16:30:03 +0530
Subject: [PATCH] Fix Cookie::stricmp to safely lowercase signed chars

---
 lib/inc/drogon/Cookie.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/inc/drogon/Cookie.h b/lib/inc/drogon/Cookie.h
index 2f02669bd2..6527a129be 100644
--- a/lib/inc/drogon/Cookie.h
+++ b/lib/inc/drogon/Cookie.h
@@ -359,7 +359,8 @@ class DROGON_EXPORT Cookie
             return false;
         for (size_t idx{0}; idx < str1Len; ++idx)
         {
-            auto lowerChar{tolower(str1[idx])};
+            auto lowerChar{static_cast<char>(
+                std::tolower(static_cast<unsigned char>(str1[idx])))};
 
             if (lowerChar != str2[idx])
             {