Rich text editor corrupts images with UTF-8 SVG data URIs

[personalizedrefrigerator]

Environment

Joplin version: 4e25377
Platform: Desktop
OS specifics: Ubuntu 23.04

Steps to reproduce

1. Create a new note
2. Open the note in the markdown editor
3. Set the note's content to

<img src="data:image/svg+xml;utf8,<svg width=&quot;1700&quot; height=&quot;1536&quot; xmlns=&quot;http://www.w3.org/2000/svg&quot;> <path d=&quot;m0,0 l100,1000 l200,0 z&quot;/> </svg>">

4. Switch to the rich text editor
5. Edit the note
6. Switch back to the markdown editor

Describe what you expected to happen

The image should be preserved.

Related

#8735 (not loaded resources are represented partially with image tags with UTF-8 SVG data URIs).

[laurent22]

I think that's purposely disabled by the sanitizer for security reasons?

[personalizedrefrigerator]

The current output after converting from HTML->MD->HTML is

<img src="data:;base64,<svg width=" 1700"="" height="1536" xmlns="http://www.w3.org/2000/svg">

Note that it does render correctly in the HTML viewer:

[adrianvg]

I think that's purposely disabled by the sanitizer for security reasons?

Seeing this too, but don't understand why this is.
Is the sanitizer I can disable or tweak?

I'm and enduser BTW. :-)

[personalizedrefrigerator]

It looks like this is an upstream bug and was fixed in TinyMCE 6.1. Thus, upgrading TinyMCE should fix this issue.