CVE-2026-46637: Symfony Twig

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

Twig is a template language for PHP. Prior to 3.26.0, several filters in twig/markdown-extra and twig/cssinliner-extra are registered with is_safe => [all], causing Twig to treat plain text or HTML output as safe in HTML, JavaScript, CSS, URL, and other contexts where the output is not properly escaped. This issue is fixed in version 3.26.0.

Affected products

• Symfony Twig: before 3.26.0 (fixed in 3.26.0)

Published 2026-07-14. Last modified 2026-07-16.