All CISA RSS feeds are no longer loading despite the sites working

So this started last week but all my CISA RSS feeds have stopped working.

The sites load, the URL’s for the RSS feeds load, but NewsBlur keeps reporting a 404 error.

https://www.cisa.gov/about/contact-us/subscribe-updates-cisa

On this site they provide a link to this feed.
https://www.cisa.gov/cybersecurity-advisories/all.xml

It loads, but Newsblur won’t load it.

Another example is this one
hxxps://advisories.feedly.com/cisa/exploitedCve/feed.json

Same issue. I even tried to load through the URL but that didn’t work.
hxxps://www.cisa.gov/known-exploited-vulnerabilities-catalog

Not sure what’s going on.

i just tried

https://www.cisa.gov/cybersecurity-advisories/all.xml

and got 403 forbidden, not 404.

even pasting that link into this forum, i see this in the preview pane:

Sorry, we were unable to generate a preview for this web page, because the web server returned an error code of 403. Instead of a preview, only a link will appear in your post.

Interesting, so maybe the issue is on the CISA side.