From 681d2599ee224826de0050f92f65fdf96bb6a0ca Mon Sep 17 00:00:00 2001
From: Arne de Laat <arne@delaat.net>
Date: Tue, 6 Jun 2017 10:57:08 +0200
Subject: Fixed #28165 -- Ignored case in FileExtensionValidator's
 allowed_extensions.

---
 django/core/validators.py | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'django')

diff --git a/django/core/validators.py b/django/core/validators.py
index 38f6ec1284..1a36246171 100644
--- a/django/core/validators.py
+++ b/django/core/validators.py
@@ -461,6 +461,8 @@ class FileExtensionValidator:
     code = 'invalid_extension'
 
     def __init__(self, allowed_extensions=None, message=None, code=None):
+        if allowed_extensions is not None:
+            allowed_extensions = [allowed_extension.lower() for allowed_extension in allowed_extensions]
         self.allowed_extensions = allowed_extensions
         if message is not None:
             self.message = message
-- 
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