Php Version 5640 Vulnerabilities Link ~repack~ Jun 2026

Fixed CVE-2019-9021 , a heap buffer overflow found in the phar_detect_phar_fname_ext function.

These vulnerabilities, and others like them, were patched in later versions of PHP. However, since PHP 5.6.40 is no longer supported, websites using this version are left to fend for themselves, exposed to these known security risks.

Users running versions prior to 5.6.40 are affected by several critical vulnerabilities that this specific release was designed to patch:

Use compatibility checkers like (a PHP_CodeSniffer ruleset) to scan your legacy codebase for deprecated functions, removed extensions, or syntax changes before upgrading. Step 2: Utilize Hardened Third-Party Repositories php version 5640 vulnerabilities link

Gradually upgrade your staging site's PHP version on your server (e.g., 5.6 → 7.4 → 8.0 → 8.2/8.3).

Common Vulnerabilities and Exposures (CVEs) provide standardized identifiers for each security flaw. Here are the CVEs you should be aware of in relation to PHP 5.6.40.

Vulnerabilities exist that could allow attackers to execute arbitrary code on the server, potentially leading to full system compromise. Fixed CVE-2019-9021 , a heap buffer overflow found

Upgrading from 5.6 to a modern version (such as 8.1, 8.2, or later) requires planning to avoid breaking your site.

Your application may also be compromised via (e.g., Apache, OpenSSL) that themselves contain vulnerabilities. For example, the php:5.6.40-apache Docker image has been reported to contain over 513 vulnerabilities across 1033 dependency paths, including critical buffer overflows and HTTP request smuggling in Apache 2.4.25‑3+deb9u6.

If an upgrade is not immediately possible, use a Web Application Firewall (WAF) and strictly sanitize all user inputs . Users running versions prior to 5

If you have stumbled upon the search term , you are likely dealing with a legacy system running PHP 5.6.40—the very last official release of the PHP 5.x series, published on January 10, 2019.

Attackers actively scan for outdated software versions. PHP 5.6.40 is a "low-hanging fruit" for automated hacking bots.

: Historic data for PHP 5.6.x versions includes hundreds of vulnerabilities ranging from Denial of Service (DoS) Remote Code Execution (RCE) Specific CVE Examples CVE-2016-10166 : An integer underflow in the _gdContributionsAlloc function that could lead to unspecified impact. CVE-2019-6977 : A heap-based buffer overflow in gdImageColorMatch caused by improper calculation of buffer sizes. CVE-2019-9020 : A heap-based buffer over-read in the xmlrpc_decode