Challenges.cloudflare.com take 100% CPU when browsing

What is the name of the domain?

N/A

What is the issue you’re encountering

challenges.cloudflare.com takes 100% CPU when browsing, temperature went to 90°C+ (<60°C when the domain is blocked).

What steps have you taken to resolve the issue?

Blocking challenges.cloudflare.com domain.

You’ve got AMD or Intel CPU? :thinking:

Are you sure the Challeng Page was the Cloudflare official and original, and not some “malicious” as they’re already out there?

Might be some kind of a malicious page trying to abuse your device and using the needed CPU power (cryptomining, virus, malware …).

Otherwise, you’re heatsink might bot be alligned well on the CPU socket if you’ve got such high “spike” of the temperature change, as well as possible Turbo Boost option and other features available which cause such behaviours in temperature changes.
Is it the default heatsink or some other with cooler?

I don’t get this right. Is this temperature when you’re experiencing the default Cloudflare WAF block page (403 error)? :thinking:

For sure it consume some CPU percentage to complete and verify the challenge.

Are you sure the Challeng Page was the Cloudflare official and original, and not some “malicious” as they’re already out there?
Might be some kind of a malicious page trying to abuse your device and using the needed CPU power (cryptomining, virus, malware …).

I copy-pasted the domain.

You’ve got AMD or Intel CPU? :thinking:
Otherwise, you’re heatsink might bot be alligned well on the CPU socket if you’ve got such high “spike” of the temperature change, as well as possible Turbo Boost option and other features available which cause such behaviours in temperature changes.
Is it the default heatsink or some other with cooler?

Not relevant.

I don’t get this right. Is this temperature when you’re experiencing the default Cloudflare WAF block page (403 error)? :thinking:

When I kill and block the challenge. I didn’t got a 403 error so far.

For sure it consume some CPU percentage to complete and verify the challenge.
For hours, without stopping ?

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