Php Version 5640 Vulnerabilities Link May 2026

PHP version 5.6.40 was the final security release for the PHP 5.6 branch. While its release in early 2019 fixed several critical issues, it is now officially End of Life (EOL) and has not received official security patches since late 2018. Critical Vulnerabilities Fixed in 5.6.40

PHAR Reading Issues (CVE-2019-9021): A heap-based buffer over-read in the PHAR extension may allow attackers to read memory past actual data while parsing filenames.

4. If You Actually Meant "5.6.4.0" (Alpha/Beta)

If your system reports 5.6.4.0 (rare), that would be an unstable alpha version from ~2014. It contains hundreds of known vulnerabilities, including critical remote code execution bugs. Do not use it anywhere.

Detailed lists of historical vulnerabilities and CVEs for this version can be found on CVE Details Blog Post: The Hidden Risk of PHP 5.6.40 in 2026 If you are still running PHP 5.6.40

// Request Analyzer function analyzeRequest($request) global $vulnerabilityDB; foreach ($vulnerabilityDB as $function => $vulnerability) if (preg_match($vulnerability['exploit_pattern'], $request)) // Block the request return false;

Would you like an exported CSV of these CVEs or help interpreting any specific vulnerability?

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PHP version 5.6.40 was the final security release for the PHP 5.6 branch. While its release in early 2019 fixed several critical issues, it is now officially End of Life (EOL) and has not received official security patches since late 2018. Critical Vulnerabilities Fixed in 5.6.40

PHAR Reading Issues (CVE-2019-9021): A heap-based buffer over-read in the PHAR extension may allow attackers to read memory past actual data while parsing filenames.

4. If You Actually Meant "5.6.4.0" (Alpha/Beta)

If your system reports 5.6.4.0 (rare), that would be an unstable alpha version from ~2014. It contains hundreds of known vulnerabilities, including critical remote code execution bugs. Do not use it anywhere.

Detailed lists of historical vulnerabilities and CVEs for this version can be found on CVE Details Blog Post: The Hidden Risk of PHP 5.6.40 in 2026 If you are still running PHP 5.6.40

// Request Analyzer function analyzeRequest($request) global $vulnerabilityDB; foreach ($vulnerabilityDB as $function => $vulnerability) if (preg_match($vulnerability['exploit_pattern'], $request)) // Block the request return false;

Would you like an exported CSV of these CVEs or help interpreting any specific vulnerability?

Before you go...