Government Websites Go Dark After Severe PHP Vulnerabilities Disclosed

October 21, 2026

“PHP disclosed two critical vulnerabilities in their programming language and urged web site operators to immediately apply the fix,” writes longtime Slashdot reader smooth wombat. “As a result, government web sites in Europe and elsewhere temporarily went dark on Wednesday as operators worked to protect their systems.” The Independent reports: Dane Knecht, the chief technology officer of Web and cloud security firm Cloudflare, said that attacks were emerging and Cloudflare was updating its firewall rules as a stopgap measure. “We are seeing early attacks emerging and are updating mitigations as new vectors show up. This is a STOPGAP only. Patch as soon as PHP releases the update,” he said on X.

Officials have said that all PHP versions from PHP 5 onward could be affected, although PHP has not yet disclosed which versions are vulnerable. Special thanks to Slashdot readers Alain Williams and mrspoonsi for sharing this critical PHP security release.

For more details, read the official PHP announcement and guidance on what to do next.