---
title: "Django 1.11.11 リリースノート"
version: 3.0
locale: ja
source: https://docs.djangoproject.com/ja/3.0/releases/1.11.11/
canonical: https://djangodocs.dev/ja/3.0/releases/1.11.11/
---
# Django 1.11.11 リリースノート

*2018年3月6日*

Django 1.11.11 では、1.11.10 にあった2つのセキュリティの問題を修正しました。

## CVE-2018-7536: `urlize` と `urlizetrunc` テンプレートフィルタにおける DoS 攻撃の可能性

The `django.utils.html.urlize()` function was extremely slow to evaluate
certain inputs due to catastrophic backtracking vulnerabilities in two regular
expressions. The `urlize()` function is used to implement the `urlize` and
`urlizetrunc` template filters, which were thus vulnerable.

The problematic regular expressions are replaced with parsing logic that
behaves similarly.

## CVE-2018-7537: Denial-of-service possibility in `truncatechars_html` and `truncatewords_html` template filters

If `django.utils.text.Truncator`'s `chars()` and `words()` methods were
passed the `html=True` argument, they were extremely slow to evaluate certain
inputs due to a catastrophic backtracking vulnerability in a regular
expression. The `chars()` and `words()` methods are used to implement the
`truncatechars_html` and `truncatewords_html` template filters, which were
thus vulnerable.

The backtracking problem in the regular expression is fixed.