Threat database

CVE-2026-23524 is a critical deserialization vulnerability in Laravel Reverb versions below 1.7.0 that allows unauthenticated remote code execution. The flaw arises because data from Redis channels is passed directly into PHP's unserialize() function without class restrictions, enabling attackers to instantiate malicious objects. Exploitation is facilitated by the common practice of deploying Redis without authentication and occurs only when horizontal scaling is enabled (REVERB_SCALING_ENABLED=true). The vulnerability impacts confidentiality, integrity, and availability with a CVSS score of 9.8. Mitigation includes upgrading to Laravel Reverb 1.7.0 or later, enforcing strong Redis authentication, restricting Redis access to private networks, or disabling horizontal scaling if feasible.