CVE-2019-18888: Fedoraproject Fedora

High severity, CVSS 7.5. EPSS: 2.2% chance of exploitation in the next 30 days.

An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command. This is related to symfony/http-foundation (and symfony/mime in 4.3.x).

Affected products

• Fedoraproject Fedora: version 30 only; version 31 only
• Sensiolabs Symfony: from 2.8.0, up to and including 2.8.50; from 3.4.0, up to and including 3.4.34; from 4.2.0, up to and including 4.2.11; from 4.3.0, up to and including 4.3.7

Published 2019-11-21. Last modified 2026-06-17.