Tech

Introducing the Cloudflare PHP Capture the Flag challenge

Cloudflare Blog·Oct 27, 2026 · 8:00 AM CT
Readthrough summary

Cloudflare launched a PHP Capture the Flag challenge after a turbulent week in internet security that included eight compromised eMudhra intermediate certificates and the php2shell PHP vulnerabilities. The company says it shipped mitigations and new WAF rules to block exploitation.

Summary written by Readthrough from the original article. The full story, with photos and any updates, is at Cloudflare Blog.

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