CVE-2026-48806: Symfony Twig

Critical severity, CVSS 9.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Twig is a template language for PHP. Prior to 3.27.0, ArrayExpression does not guard dynamic mapping keys that are coerced to strings, allowing PHP to invoke __toString() on a Stringable object used as a mapping key without calling SandboxExtension::ensureToStringAllowed(). 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 2026-07-17.