Php Version 5640 Vulnerabilities Verified Jun 2026

PHP 5.6.40 was released on . It was the final official release of the PHP 5.6 series. Crucially, it included only security fixes for bugs discovered before the EOL date .

PHP 5.x has a history of Object Injection vulnerabilities. While 5.6.40 patched many previous issues, it lacks the modern safeguards against deserialization attacks found in PHP 7.4 and 8.x. php version 5640 vulnerabilities verified

: Many versions of 5.6.40 are bundled with outdated libraries (like ) that have their own critical security flaws (e.g., CVE-2021-22947 Vulnerabilities Fixed If you are upgrading php version 5640 vulnerabilities verified

| CVE | Description | Impact | |------|-------------|--------| | | FastCGI (PHP-FPM) — specially crafted request causes 502 response and memory corruption | Remote Code Execution (RCE) under certain configurations | | CVE-2019-9641 | exif_read_data() — heap-based buffer over-read | Information disclosure / DoS | | CVE-2019-9021 | php_url_parse_ex() — invalid URL parsing leads to CRLF injection | HTTP response splitting, SSRF | | CVE-2019-9020 | xmlrpc_decode() — persistent use-after-free | RCE (theoretical, DoS confirmed) | | CVE-2016-1903 | imap_open() — improper argument filtering | RCE via mailbox name parameter (still present in 5.6.40) | php version 5640 vulnerabilities verified

version since December 2018 means it no longer receives official security patches from the