CVE-2026-23524
CriticalSummary
Laravel Reverb to backend komunikacji WebSocket w czasie rzeczywistym dla aplikacji Laravel. W wersjach 1.6.3 i starszych, Reverb przekazuje dane z kanału Redis bez ograniczeń dotyczących klas, które mogą być zainicjowane, co naraża użytkowników na zdalne wykonanie kodu.
Risk Assessment
Ryzyko dla organizacji polega na możliwości zdalnego wykonania kodu, co może prowadzić do przejęcia kontroli nad aplikacją. Wzmożone ryzyko występuje, gdy serwery Redis są wdrażane bez uwierzytelnienia, a funkcjonalność jest aktywna przy włączonym skalowaniu poziomym.
Recommendation
Zaleca się wymuszenie silnego hasła dla dostępu do Redis oraz ograniczenie dostępu do usługi tylko do prywatnej sieci lub lokalnej pętli zwrotnej. Alternatywnie, można ustawić REVERB_SCALING_ENABLED=false, aby całkowicie pominąć podatną logikę, jeśli środowisko korzysta tylko z jednego węzła Reverb.
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Original NVD description (English source)
Laravel Reverb provides a real-time WebSocket communication backend for Laravel applications. In versions 1.6.3 and below, Reverb passes data from the Redis channel directly into PHP’s unserialize() function without restricting which classes can be instantiated, which leaves users vulnerable to Remote Code Execution. The exploitability of this vulnerability is increased because Redis servers are commonly deployed without authentication, but only affects Laravel Reverb when horizontal scaling is enabled (REVERB_SCALING_ENABLED=true). This issue has been fixed in version 1.7.0. As a workaround, require a strong password for Redis access and ensure the service is only accessible via a private network or local loopback, and/or set REVERB_SCALING_ENABLED=false to bypass the vulnerable logic entirely (if the environment uses only one Reverb node).
Vulnerability data from NVD (NIST) · CISA KEV · EPSS