Php Version 5640 Vulnerabilities Verified Jun 2026

A heap overflow vulnerability is present in the gd library, which is used by PHP for image processing. An attacker can exploit this vulnerability by providing a malicious image, potentially leading to arbitrary code execution or denial-of-service (DoS) attacks.

Versions of Docker images running PHP 5.6.40 often contain critical vulnerabilities in bundled libraries like libcurl (e.g., stack-based buffer overflows). Recommendations php version 5640 vulnerabilities verified

There is no officially released version "PHP 5.6.40" with an appended "0" (i.e., 5.6.400). The likely intent refers to PHP 5.6.40 (the final official security release before End-of-Life) or a typo for PHP 5.6.40 . This article will address PHP 5.6.40 as the last milestone of the PHP 5.6 branch, verifying its known vulnerabilities and why any version like "5640" is a critical red flag. A heap overflow vulnerability is present in the

PHP 5.6.40 (cli) (built: Jan 10 2019 12:00:00) Recommendations There is no officially released version "PHP

| 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) |

An integer underflow in the _gdContributionsAlloc function that could have "unspecified impact". The "Verified" Risk Today