CVE-2004-1019: The deserialization code in PHP before 4.3.10 and PHP 5.x up to 5.0.2 allows remote attackers to cause a de...

Security readout for executives and security teams

This flaw affects very old PHP versions when applications pass untrusted data into PHP unserialize handling. An attacker could crash the service and, according to the CVE description, potentially execute arbitrary code. The main business risk is legacy public PHP applications that still process serialized input. Exposure is most likely in legacy PHP 4 or early PHP 5 deployments, especially internet-facing applications that call unserialize on attacker-controlled input. Current supported PHP deployments should not be assumed vulnerable from these sources alone. Treat this as high priority only where legacy PHP is still present. The vulnerability is old, but remote code execution language and unsafe deserialization make remaining exposure unacceptable on internet-facing systems. Mitigation focus: Upgrade affected PHP runtimes beyond PHP 4.3.10 or PHP 5.0.2.; Apply fixed PHP packages from the relevant operating system vendor advisory.; Remove or redesign unserialize use on untrusted input..

Prepared

Jun 30, 2026, 01:53 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.