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GHSA-vcc8-phrv-43wj
No affected components available
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.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs high-level or administrative privileges. No user interaction is needed for the attacker to exploit this vulnerability.
Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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