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Introducing the Cloudflare PHP Capture the Flag challenge

Technology · en

Introducing the Cloudflare PHP Capture the Flag challenge

Cloudflare Blog · Official source · Oct 27, 2026, 1:00 PM UTC

We are launching a PHP Capture the Flag challenge integrated with our Bug Bounty program to test our WAF protections. Security researchers are invited to bypass our defenses and capture the flag to help make the Internet safer.