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AI Just Found a Bug That Puts Up to 70% of the World’s Websites at Risk

The fixes address remote code execution flaws rated 9.2 out of 10, and security agencies urged operators to patch or isolate affected sites.

  • On Wednesday, October 21, 2026, PHP developers released emergency updates addressing two critical remote code execution vulnerabilities, CVE-2026-109618 and CVE-2026-109619, urging all users to patch immediately.
  • The emergency release followed online leaks and reports of early exploitation, with security researchers confirming the flaws affect all PHP versions dating back to PHP 5.
  • Rated 9.2 on the CVSS severity scale, the flaws allow unauthenticated remote code execution. Longtime security consultant Davi Ottenheimer described the vulnerable file interface as "a front door with no lock."
  • Government agencies in the Netherlands and Finland took websites offline as a precaution, while the European Union's CERT-EU advised organizations to isolate internet-facing applications until patches are applied.
  • PHP powers nearly 70% of websites, raising concerns millions of servers remain exposed. Security experts warn exploit tools like "PHP2Shell" are circulating, intensifying risks of rapid attacks.
Insights by Ground AI

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Numerous websites and online services worldwide are currently in danger: The reason for this is a vulnerability in the widespread programming language PHP. The potential danger is therefore extremely high.

·Hamburg, Germany
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ReutersReuters
+10 Reposted by 10 other sources
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PHP programming language developers issue new version fixing critical vulnerabilities

Developers of the PHP ​programming language ‌said a new version fixing ​two critical ​vulnerabilities was now live ⁠and strongly ​encouraged users ​to update immediately.

·London, United Kingdom
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eSecurityPlanet broke the news on Tuesday, October 20, 2026.
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