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Security news

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threat-intelvia Cloudflare Blog — Security

Introducing the Cloudflare PHP Capture the Flag challenge

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 ca...

Oct 27, 2026 UTC
generalvia Cloudflare Blog — Security

Introducing full transaction detection for Cloudflare WAF

Cloudflare's web application firewall can now correlate an HTTP request with its response. Full transaction detection helps every customer find successful exploits, data exposure,...

Oct 21, 2026 UTC
vulnerabilityvia Cloudflare Blog — Security

Cloudflare deploys protections against php2shell vulnerability

Cloudflare has deployed default web application firewall (WAF) protections for newly disclosed PHP vulnerabilities before public disclosure. The rules use request and response sign...

Oct 21, 2026 UTC
vulnerabilityvia Cloudflare Blog — Security

Enforce positive security with Cloudflare Application Profiles

Cloudflare learns the structure of your HTTP requests and identifies deviations. You can add a positive security layer that helps reduce attack surface as AI makes it easier for at...

Sep 29, 2026 UTC