From 9e9792228a6bb5d6402a5d645bc3be4cf364aefb Mon Sep 17 00:00:00 2001
From: Sarah Boyce <42296566+sarahboyce@users.noreply.github.com>
Date: Wed, 26 Jun 2024 12:11:54 +0200
Subject: Fixed CVE-2024-39614 -- Mitigated potential DoS in
 get_supported_language_variant().

Language codes are now parsed with a maximum length limit of 500 chars.

Thanks to MProgrammer for the report.
---
 docs/ref/utils.txt | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'docs/ref')

diff --git a/docs/ref/utils.txt b/docs/ref/utils.txt
index 9fb1e83e9e..65dc9952bc 100644
--- a/docs/ref/utils.txt
+++ b/docs/ref/utils.txt
@@ -1147,6 +1147,11 @@ For a complete discussion on the usage of the following see the
     ``lang_code`` is ``'es-ar'`` and ``'es'`` is in :setting:`LANGUAGES` but
     ``'es-ar'`` isn't.
 
+    ``lang_code`` has a maximum accepted length of 500 characters. A
+    :exc:`ValueError` is raised if ``lang_code`` exceeds this limit and
+    ``strict`` is ``True``, or if there is no generic variant and ``strict``
+    is ``False``.
+
     If ``strict`` is ``False`` (the default), a country-specific variant may
     be returned when neither the language code nor its generic variant is found.
     For example, if only ``'es-co'`` is in :setting:`LANGUAGES`, that's
@@ -1155,6 +1160,11 @@ For a complete discussion on the usage of the following see the
 
     Raises :exc:`LookupError` if nothing is found.
 
+    .. versionchanged:: 4.2.14
+
+        In older versions, ``lang_code`` values over 500 characters were
+        processed without raising a :exc:`ValueError`.
+
 .. function:: to_locale(language)
 
     Turns a language name (en-us) into a locale name (en_US).
-- 
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