Cloudflare Outage – What Really Went Wrong on November 18, 2025

Cloudflare’s huge outage – what actually went wrong?

A few days ago, I wrote about how a sudden Cloudflare meltdown made huge parts of the internet feel “broken” – from games and gaming sites to tools many of us use every day. This follow-up is the short version of what Cloudflare has now confirmed actually happened, and what we can take from it as players, creators, and devs.

On November 18, 2025, Cloudflare – the company that sits in front of a massive chunk of the web as a security and content delivery layer – started throwing 500 Internal Server Error pages for millions of users. Cloudflare isn’t “just another website”; it’s the door between you and the games, apps, and services you’re trying to reach. When that door jams, your favourite game might still be running fine on its own servers, but from your side it looks completely dead.

Cloudflare’s own post-mortem pins the incident on a bug in its Bot Management system. A configuration “feature file” that tells Cloudflare how to handle bad or automated traffic suddenly grew far beyond the size their software expected. That oversized file was pushed across Cloudflare’s global network and triggered crashes in the traffic-handling systems that sit in the critical path for many of their services. The result: error 500s everywhere for a few hours, even though the underlying sites and games hadn’t been hacked or taken over. Cloudflare also stresses there’s no evidence this was a cyberattack – it was a self-inflicted software/configuration failure.

Canva was one of many services hit when Cloudflare went down on November 18, 2025, leaving users staring at error screens instead of their projects.

Because Cloudflare fronts such a huge part of the internet, the blast radius was enormous. Platforms like X, ChatGPT, Spotify, transport sites, government portals, and online games like League of Legends all saw users locked out or staring at “internal server error” messages.

For players it just felt like everything fell over at once. For devs and small studios, it was a brutal reminder that even if your own code is solid, someone else’s bad config file can still be the reason your community can’t log in, claim keys, or read your latest update.

So what do we take from this? You can’t personally fix Cloudflare, but you can design around the reality that outages like this will happen again. That means having clear status messaging, communicating honestly with your players when the problem is upstream, and thinking about how dependent your game is on single points of failure you don’t control. As players, it’s also a good reminder not to instantly dog-pile the devs every time a launcher or live service goes dark – sometimes the thing that really broke was an invisible piece of infrastructure you never see.

Related reading: If you’re interested in how infrastructure, ownership, and platform rules shape the games we play, you might also want to read our investigation into who really owns Tanks Blitz: Who owns Tanks Blitz? East Games, Lesta, platform rules, and player trust.