🐛 Prevent key duplication in symbolize_hash_keys

Author: pboling

CHANGELOG.md

@@ -41,6 +41,8 @@ Please file a bug if you notice a violation of semantic versioning.
 
 ### Fixed
 
+- Prevent key duplication in symbolize_hash_keys
+
 ### Security
 
 ## [2.3.0-gl] (gitlab fork) - 2025-08-20

lib/omniauth-ldap/adaptor.rb

@@ -246,11 +246,9 @@ def sanitize_hash_values(hash)
       end
 
       def symbolize_hash_keys(hash)
-        hash.keys.each do |key|
-          hash[key.to_sym] = hash[key]
+        hash.each_with_object({}) do |(key, value), result|
+          result[key.to_sym] = value
         end
-
-        hash
       end
     end
   end