When I pasted an English article into Substack, saving the draft was blocked with a 403. The cause was "../../etc/passwd" in the body text

On October 19, 2026, when I pasted an English article into the Substack editor, the draft would not save, and the screen ...

When I had AI paste an English article into Substack, I couldn't save the draft

I am using AI (Claude Code) to publish articles across four different platforms. For my English Substack, the AI pastes the ...
Mashable

Substack Notes is now available to all

It's official: Everyone can use Substack Notes now. This new feature from Substack, a newsletter platform, allows anyone with an account to share links, images, thoughts, and snippets from their ...
TechCrunch

Substack’s new short-form ‘Notes’ feed looks a lot like Twitter

Substack announced today that it’s introducing a new Notes feature that is designed to let users share posts, quotes, comments, images, links and ideas. Notes shared on the platform are displayed in a ...