CVE-2023-0568: PHP

High severity, CVSS 8.1. EPSS: 1.2% chance of exploitation in the next 30 days.

In PHP 8.0.X before 8.0.28, 8.1.X before 8.1.16 and 8.2.X before 8.2.3, core path resolution function allocate buffer one byte too small. When resolving paths with lengths close to system MAXPATHLEN setting, this may lead to the byte after the allocated buffer being overwritten with NUL value, which might lead to unauthorized data access or modification.

Affected products

• PHP PHP: from 8.0.0, before 8.0.28 (fixed in 8.0.28); from 8.1.0, before 8.1.16 (fixed in 8.1.16); from 8.2.0, before 8.2.3 (fixed in 8.2.3)

Published 2023-02-16. Last modified 2026-06-17.