cvedb.io
CVE-2026-23524
CRITICAL · CVSS 9.8
EPSS exploitation probability: 0%
Published 2026-01-21T22:15:50.280 · Last modified 2026-06-17T10:21:43.507

Summary

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 ent

Affected products

laravel — reverb

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.