CVE-2011-4885: PHP

Medium severity, CVSS 5.0. EPSS: 83.4% chance of exploitation in the next 30 days.

PHP before 5.3.9 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.

Affected products

• PHP PHP: up to and including 5.3.8; version 5.0.0 only; version 5.0.1 only; version 5.0.2 only; version 5.0.3 only; version 5.0.4 only; …

Published 2011-12-30. Last modified 2026-06-16.