PHP2Shell flaws CVE-2026-109618 and -109619: checklist for patching client servers

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PHP's security team fixed two critical flaws, CVE-2026-109618 and CVE-2026-109619, on 21 October 2026, collectively called php2shell. Tenable, citing the PHP team, rates both at CVSS v4.0 9.2 and says unauthenticated remote attackers can exploit them. Amazon's honeypots logged exploitation attempts beginning 17 October, and the company reports broad attempts in the wild. The article presents a freelancer-oriented checklist for inventorying PHP installs and verifying patch status, noting that updating PHP is the only complete fix. Versions 8.2 through 8.5 have official fixed releases, while older branches depend on OS vendor backports or are end-of-life.

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