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Timeline showing PHP2Shell exploitation attempts on October 17, embargo leak on October 20, patch on October 21, and exploitation at scale on October 22, with a four-day exposure gap highlighted before any fix existed
October 22, 2026 • Frank Valcarcel

PHP2Shell: Patch, Rotate, Harden. A 10-Point Checklist for the Rest of Us.

PHP2Shell puts two critical vulnerabilities in the PHP runtime that powers 70% of websites. Here is what to patch, what to rotate, and the 10-point hardening checklist to follow.

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