Описание
Twig: Sandbox property allowlist bypass via the column filter (array_column on objects)
Description
The column filter passes its input straight to PHP's native array_column(). When the array elements are objects, array_column() reads $obj->$name (and $obj->$index) directly, including invoking __get/__isset. Because this property read happens entirely in PHP native code and never reaches CoreExtension::getAttribute(), SandboxExtension::checkPropertyAllowed() is never consulted.
An untrusted template author with column in their allowedFilters list can therefore read any public or magic property of any object reachable in the render context, regardless of the SecurityPolicy allowedProperties list. This is a variant of CVE-2024-51755 / GHSA-jjxq-ff2g-95vh that the ArrayAccess-focused fix did not cover.
Resolution
The column filter now routes object property reads through the sandbox-aware attribute accessor so the property allowlist is enforced.
Credits
Twig: would like to thank Claude Mythos Preview (via Project Glasswing) for reporting the issue and providing the fix.
Пакеты
twig/twig
< 3.26.0
3.26.0
Связанные уязвимости
Twig is a template language for PHP. Prior to 3.26.0, the column filter passes object arrays to PHP array_column(), which reads public and magic properties without reaching CoreExtension::getAttribute() or SandboxExtension::checkPropertyAllowed(), allowing an untrusted template author with column in allowedFilters to read properties that are not in the sandbox allowlist. This issue is fixed in version 3.26.0.
Twig is a template language for PHP. Prior to 3.26.0, the column filter passes object arrays to PHP array_column(), which reads public and magic properties without reaching CoreExtension::getAttribute() or SandboxExtension::checkPropertyAllowed(), allowing an untrusted template author with column in allowedFilters to read properties that are not in the sandbox allowlist. This issue is fixed in version 3.26.0.
Twig is a template language for PHP. Prior to 3.26.0, the column filte ...