CVE-2006-3017: PHP

High severity, CVSS 9.3. EPSS: 4.1% chance of exploitation in the next 30 days.

zend_hash_del_key_or_index in zend_hash.c in PHP before 4.4.3 and 5.x before 5.1.3 can cause zend_hash_del to delete the wrong element, which prevents a variable from being unset even when the PHP unset function is called, which might cause the variable's value to be used in security-relevant operations.

Affected products

• PHP PHP: up to and including 4.4.2; version 3.0 only; version 3.0.1 only; version 3.0.2 only; version 3.0.3 only; version 3.0.4 only; …

Published 2006-06-14. Last modified 2026-06-16.