CVE-2026-59989 Phalcon Volt compiler `join` filter compile-time PHP code injection (SSTI lead to RCE)

Phalcon is a high-performance, full-stack PHP framework. In 5.15.0 and earlier, resolveFilter in phalcon/Mvc/View/Engine/Volt/Compiler.zep builds the join filter by inserting the raw separator and array token values into generated PHP without passing them through expression. An attacker who can...

CVE-2026-59989

Phalcon (PHP framework) versions 5.15.0 and earlier are vulnerable to a Server-Side Template Injection (SSTI) in the Volt compiler's join filter. The root cause is in resolveFilter within phalcon/Mvc/View/Engine/Volt/Compiler.zep, which inserts raw separator and array token values directly into g...