# \[ANN\] loofah 2.1.0 released

**URL:** <https://rubytalk.org/t/ann-loofah-2-1-0-released/74288>\
**Category:** ruby-talk\
**Created:** [24 September 2017 20:58 UTC](https://rubytalk.org/t/ann-loofah-2-1-0-released/74288 "2017-09-24T20:58:37Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Mike\_Dalessio1](https://yyz1.discourse-cdn.com/flex029/user_avatar/rubytalk.org/mike_dalessio1/32/1903_2.png) [@Mike\_Dalessio1](https://rubytalk.org/u/Mike_Dalessio1)\
**Post date:** [24 September 2017 20:58 UTC](https://rubytalk.org/t/ann-loofah-2-1-0-released/74288/1 "2017-09-24T20:58:37Z")

</div>

loofah version 2.1.0 has been released!

TL;DR: CSS property parsing and sanitization has been re-implemented on top  
of Crass:

&nbsp;&nbsp;&nbsp;&nbsp;[https://github.com/rgrove/crass](https://github.com/rgrove/crass)

replacing the regexes that were lifted from html5lib back in 2009. I'm  
relatively sure this is a good thing.

Note that Loofah underlies Rails sanitization since 4.2, so please do let  
me know via Github issue if this breaks any behavior for you. (Also note  
that this change has been available in RCs since August 2015.)

Full changelog below.

-m

> **···**
>
> ---
> 
> Loofah is a general library for manipulating and transforming HTML/XML  
> documents and fragments. It's built on top of Nokogiri and libxml2, so  
> it's fast and has a nice API.
> 
> Loofah excels at HTML sanitization (XSS prevention). It includes some  
> nice HTML sanitizers, which are based on HTML5lib's whitelist, so it  
> most likely won't make your codes less secure. (These statements have  
> not been evaluated by Netexperts.)
> 
> ActiveRecord extensions for sanitization are available in the  
> `loofah-activerecord` gem (see  
> [https://github.com/flavorjones/loofah-activerecord](https://github.com/flavorjones/loofah-activerecord)).
> 
> Changes:
> 
> ## 2.1.0 / 2017-09-24
> 
> Notes:
> 
> \* Re-implemented CSS parsing and sanitization using the {crass}[  
> [https://github.com/rgrove/crass](https://github.com/rgrove/crass)] library. #91
> 
> Features:
> 
> \* Added :noopener HTML scrubber (Thanks, @tastycode!)  
> \* Support `data` URIs with the following media types: text/plain, text/css,  
> image/png, image/gif, image/jpeg, image/svg+xml. #101, #120. (Thanks,  
> @mrpasquini!)
> 
> Bugfixes:
> 
> \* The :unprintable scrubber now scrubs unprintable characters in CDATA  
> nodes (like `\<script\>`). #124  
> \* Allow negative values in CSS properties. Restores functionality that was  
> reverted in v2.0.3. #91