CVE-2016-2554: PHP

Critical severity, CVSS 9.8. EPSS: 11% chance of exploitation in the next 30 days.

Stack-based buffer overflow in ext/phar/tar.c in PHP before 5.5.32, 5.6.x before 5.6.18, and 7.x before 7.0.3 allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted TAR archive.

Affected products

• PHP PHP: version 7.0.0 only; version 7.0.1 only; version 7.0.2 only; up to and including 5.5.31; version 5.6.0 only; version 5.6.1 only; …

Published 2016-05-16. Last modified 2026-06-17.