lxml@4.4.0 vulnerabilities

Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API.

Known vulnerabilities in the lxml package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability	Vulnerable Version
M NULL Pointer Dereference Affected versions of this package are vulnerable to NULL Pointer Dereference in the `iterwalk()` function (used by `canonicalize`) that can be triggered by malicious input. NOTE: This only applies when lxml is used together with libxml2 2.9.10 through 2.9.14. How to fix NULL Pointer Dereference? Upgrade `lxml` to version 4.9.1 or higher.	[,4.9.1)
H Cross-site Scripting (XSS) Affected versions of this package are vulnerable to Cross-site Scripting (XSS). The HTML Cleaner in `lxml.html` lets certain crafted script content pass through, as well as script content in `SVG` files embedded using data URIs. How to fix Cross-site Scripting (XSS)? Upgrade `lxml` to version 4.6.5 or higher.	[,4.6.5)
M Cross-site Scripting (XSS) Affected versions of this package are vulnerable to Cross-site Scripting (XSS) via `formaction` attribute in HTML5. How to fix Cross-site Scripting (XSS)? Upgrade `lxml` to version 4.6.3 or higher.	[0,4.6.3)
H Cross-site Scripting (XSS) Affected versions of this package are vulnerable to Cross-site Scripting (XSS). The HTML Cleaner allowed JavaScript to pass through. The cleaner now removes more sneaky "style" content. How to fix Cross-site Scripting (XSS)? Upgrade `lxml` to version 4.6.2 or higher.	[,4.6.2)