Update golang.org/x/net to latest and force latest version

Bumping version and ensuring latest golang.org/x/net as the HTTP rapid reset is triggering primitive vuln scanners, we do not implement a HTTP2 server and are not vulnerable but a minor bump can still help reduce noise for those searching for what they need to upgrade and patch.

Nothing else is in this release aside from the dependency updates and some staticcheck messages being resolved that should not modify behaviour.

Added `src` rewriter to allow for proxying inline assets.

What's Changed

• Bump golang.org/x/net from 0.10.0 to 0.12.0 by @dependabot in #178
• Prefer explicit rules over regexp by @KN4CK3R in #182
• Added src rewriter by @yyewolf in #179

New Contributors

• @yyewolf made their first contribution in #179

Full Changelog: v1.0.24...v1.0.25

Added AllowURLSchemesMatching

This is a feature release, there are no security fixes in this release.

What's Changed

• Minor bug fix parsing style attribute with trailing spaces by @sergeyfedotov in #172
• Allow custom URL schemes by matching regex by @yardenshoham in #175
• Bump golang.org/x/net from 0.8.0 to 0.10.0 by @dependabot in #173

New Contributors

• @sergeyfedotov made their first contribution in #172
• @yardenshoham made their first contribution in #175

Full Changelog: v1.0.23...v1.0.24

Resolve golang.org/x/net CVE-2022-41723

What's Changed

• Upgrade golang.org/x/net to 0.8.0 by @barshociaj in #165 to address CVE-2022-41723 which requires updating the x/net dependency

New Contributors

• @barshociaj made their first contribution in #165

Full Changelog: v1.0.22...v1.0.23

Add `picture` to list of elements allowed without attributes

This is not a security update!

This is a usability update as some HTML elements are valid without attributes however the default behaviour is to strip these out of an abundance of caution. The picture element https://developer.mozilla.org/en-US/docs/Web/HTML/Element/picture is one such element where it merely changes the browser rendering such that one of the child elements will be rendered.

The picture element was not present in the allowlist when it should have been, and so this release fixes that as per #161 .

Very minor bug fix to remove empty elements without attributes

Thanks to @Gusted for #151 which fixes a bug that allowed a policy to be defined in a way that input could've allowed an empty and meaningless element to be left in the output when it should not have done so.

This is not a security issue, and the details can be seen in the PR comment.

Updated x/net/html

This is an update of dependencies, specifically it updates the HTML parser within go/net/html.

The update removes a capability, Microsoft style comments that allow browser conditionals no longer works. This is due to a fix on the part of the Go team to prevent XSS within HTML comments, and the commit in question is here golang/net@06994584 . There is no easy to see safe way to restore that functionality without adding more risk to those who .AllowComments() and so I am accepting that this non-standard use of HTML comments is no longer supported.

As part of this version, the older release of v1.0.19 is retracted.

Add SVG inline images, improve RGB color and length matching, fix bug

What's Changed

• css: improve RGB hex color and length matching by @hochhaus in #142
• css: add support for image/svg+xml for data-uri inline images
• html: fix double-escaping of content within HTML attributes
• tests: added more tests to provide examples of proofs of some open issues

New Contributors

• @hochhaus made their first contribution in #142

Full Changelog: v1.0.18...v1.0.19

Fix bug in iframe sandboxvalues

What's Changed

• Fix incorrect handling of iframe SandboxValues by @kiwiz in #138

Full Changelog: v1.0.17...v1.0.18

Add support for the "sandbox" attribute on the "iframe" element

As per #135 @kiwiz has added support to bluemonday that allows the iframe element to correctly declare the security attribute sandbox.

You can read about that attribute here: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/iframe#attr-sandbox

No other change is in this release.