CVE-2024-28861: FRIENDSOFSYMFONY1 SYMFONY1

Critical severity, CVSS 9.8. EPSS: 1.5% chance of exploitation in the next 30 days.

Symfony 1 is a community-driven fork of the 1.x branch of Symfony, a PHP framework for web projects. Starting in version 1.1.0 and prior to version 1.5.19, Symfony 1 has a gadget chain due to dangerous deserialization in `sfNamespacedParameterHolder` class that would enable an attacker to get remote code execution if a developer deserializes user input in their project. Version 1.5.19 contains a patch for the issue.

Affected products

• FRIENDSOFSYMFONY1 SYMFONY1: from 1.1.0, before 1.5.9 (fixed in 1.5.9)

Published 2024-03-22. Last modified 2026-06-17.