Pasting images from MC Word doesn't work in manual test in safari

[illia-stv]

📝 Provide detailed reproduction steps (if any)

1. Select entire document including image in MC Word
2. Open manual test in Safari
3. Paste it in the editor

✔️ Expected result

Images are pasted

❌ Actual result

Images didn't paste

❓ Possible solution

If you have ideas, you can list them here. Otherwise, you can delete this section.

📃 Other details

• Browser: …
• OS: …
• First affected CKEditor version: …
• Installed CKEditor plugins: …

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[niegowski]

This is happening only in manual tests in Safari.

Looking at the console you can see:

This indicates that CSP is enabled in this manual test and it does not allow img-src blob:. Since Safari is providing images pasted from the Word as Blob objects, this is causing the failure of image load. The solution would be to update CSP to allow blob: for img-src.

Probably we should update CSP guide: https://ckeditor.com/docs/ckeditor5/latest/installation/advanced/csp.html