Critical (9.8) in php php. 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.
Severity
CVSS 3.1
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
5.2% chance of exploitation in the next 30 days; higher than 92% of CVEs (scores of 2026-10-31)