Fixed CVE-2016-10166 (use-after-free via imagescale ) and CVE-2019-6977 (heap-based buffer overflow in gdImageColorMatch ).
This changelog is the master list, maintained by the PHP development team. It details every bug and security fix that went into the release. For version 5.6.40, it lists numerous fixes, many of which are for critical security issues, including:
To help tailor this advice, could you share whether you are trying to running PHP 5.6.40 or if you are preparing a migration plan for a legacy application? Share public link php version 5640 vulnerabilities link
PHP 5.6.40 was released on January 10, 2019. It marked the absolute end-of-life (EOL) for the PHP 5.6 release cycle. No official security patches or updates have been issued for this version by the PHP development team since that date.
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 , meaning it has not received official security updates or bug fixes for over seven years. Key Vulnerabilities in PHP 5.6.40 For version 5
Running PHP 5.6.40 is not just a technical debt; it is a security incident waiting to happen. While the vulnerability links provided above can help you document the risks, the only responsible action is to formulate a migration plan.
) can lead to unauthorized data access or application crashes. Out-of-Bounds Reads: xmlrpc_decode CVE-2019-9024 No official security patches or updates have been
. Since that date, the official PHP development team has provided no security updates or bug fixes
The final release closed several severe loopholes outlined in the PHP 5 ChangeLog , specifically targeting core extensions like GD, Mbstring, Phar, and Xmlrpc:
PHP 7 and 8 brought significant syntax changes. Code must be updated to be compatible with PHP 8.x.