Php Version 5640 Vulnerabilities Link Best Link
PHP version 5.6.40 was released on January 10, 2019, as the final security release for the PHP 5.6 branch. While it addressed several critical security bugs at the time, it reached its official End of Life (EOL) on December 31, 2018, meaning it has not received official security updates or bug fixes for over seven years. Key Vulnerabilities in PHP 5.6.40
Users running versions prior to 5.6.40 are affected by several critical vulnerabilities that this specific release was designed to patch: php version 5640 vulnerabilities link
PHP 5.6.40 is the final security release of the PHP 5.6 branch and reached its official End of Life (EOL) on December 31, 2018. Because official support has ended, no new security patches are released by the PHP Group, leaving any newly discovered flaws unpatched. Critical Vulnerabilities Summary PHP version 5
What you will find there:
If you are reading this, you likely maintain a legacy application or have encountered a server still running PHP 5.6.40. Official ChangeLog : The PHP 5 ChangeLog provides
Official Sources
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Official ChangeLog: The PHP 5 ChangeLog provides the definitive list of bugs fixed in the 5.6.40 release.
Link 2: The National Vulnerability Database (NVD) Search
For government-grade tracking, use the NVD: