CVE-2026-49981: Symfony Twig

High severity, CVSS 8.2. EPSS: 0.4% chance of exploitation in the next 30 days.

Twig is a template language for PHP. Prior to 3.27.0, the per-template filter, tag, and function allow-list verdict is computed when a Template instance is constructed and can remain cached after sandbox state changes between renders, allowing a later sandboxed render to reuse a template that was originally checked with a different or empty policy. This issue is fixed in version 3.27.0.

Affected products

• Symfony Twig: before 3.27.0 (fixed in 3.27.0)

Published 2026-07-14. Last modified 2026-07-21.