CVE-2016-4344: PHP

Critical severity, CVSS 9.8. EPSS: 5.2% chance of exploitation in the next 30 days.

Integer overflow in the xml_utf8_encode function in ext/xml/xml.c in PHP before 7.0.4 allows remote attackers to cause a denial of service or possibly have unspecified other impact via a long argument to the utf8_encode function, leading to a heap-based buffer overflow.

Affected products

• PHP PHP: from 7.0.0, before 7.0.4 (fixed in 7.0.4)

Published 2016-05-22. Last modified 2026-06-17.