One option is to drop "against Hugging Face".

The "that happened" term seems a supremely important part of the title given the "is science fiction" term before it, as it clarifies the cyberattack isn't a made-up story. In contrast, the target, Hugging Face, is merely a detail that can be left for discovery upon reading the article. It's less important who was attacked than that the attack actually happened.

Without knowing the exact character limit for titles and without having the motivation this late at night to count the current title length, you may also be able to drop the "accidental" to fit in "that happened", but I worry that leaves too much of a door open for someone to interpret the attack as deliberate. As such, I strongly prefer my first option.