Vulnerabilities & Exploits

PHP's critical flaws may reach forgotten applications

CERT-EU says the PHP Foundation announced on Oct. 20 that a security release for two critical PHP flaws is scheduled for Oct. 21 at 14:00 UTC. The flaws, CVE-2026-109618 and CVE-2026-109619, reportedly affect PHP 5 and later, but no technical details or fixed versions are public.

Leaked information and the flaws’ CVSS scores point to possible unauthenticated remote code execution (RCE): running code on a server without first logging in. The actual flaw paths remain undisclosed, so neither the attack method nor the exact vulnerable builds can yet be confirmed.

If an organization has internet-facing PHP apps missing from its inventory—especially legacy PHP 5 deployments—it may not know which systems are in scope when fixes arrive. Until PHP publishes the release details, the breadth of exposure remains reported rather than verified.

9 sources · 1h ago

CVE-2026-109618

NVD KEV

CVE-2026-109619

NVD KEV

Timeline

Sources

Part of the PlainSec briefing for 2026-10-21

Every edition of this story: PHP's critical flaws may reach forgotten applications

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