Laravel Redis Horizontal Scaling Insecure Deserialization
Impact
This vulnerability affects Laravel Reverb versions prior to v1.7.0 when horizontal scaling is enabled (REVERB_SCALING_ENABLED=true).
The exploitability of this vulnerability is increased because Redis servers are commonly deployed without authentication.
With horizontal scaling enabled, Reverb servers communicate via Redis PubSub. Reverb previously passed data from the Redis channel directly into PHP’s unserialize() function without restricting which classes could be instantiated.
Risk: Remote Code Execution (RCE)
Patches
This vulnerability is fixed in Laravel Reverb v1.7.0.
Update your dependency to laravel/reverb: ^1.7.0 immediately.
Workarounds
If you cannot upgrade to v1.7.0, you should apply the following mitigations:
- Redis Security: Require a strong password for Redis access and ensure the service is only accessible via a private network or local loopback.
- Disable Scaling: If your environment uses only one Reverb node, set
REVERB_SCALING_ENABLED=falseto bypass the vulnerable logic entirely.
Credits
This vulnerability was discovered and responsibly reported by Mohammad Yaser Abo-Elmaaty @m0h4mmad
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de Composer | laravel/reverb | < 1.7.0 | 1.7.0 |
Referencias
- https://github.com/laravel/reverb/security/advisories/GHSA-m27r-m6rx-mhm4
- https://nvd.nist.gov/vuln/detail/CVE-2026-23524
- https://github.com/laravel/reverb/commit/9ec26f8ffbb701f84920dd0bb9781a1797591f1a
- https://github.com/laravel/reverb
- https://github.com/laravel/reverb/releases/tag/v1.7.0
- https://laravel.com/docs/12.x/reverb#scaling
- https://laravel.com/docs/reverb#scaling
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Debilidad (CWE)
CWE-502- Plataforma
- Composer
- Paquete
laravel/reverb- Publicada
- 21.01.2026
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-m27r-m6rx-mhm4 - CC BY 4.0
Historial de vulnerabilidades: laravel/reverb
Todas las vulnerabilidades publicadas de este paquete (Paquete de Composer), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 2
- Primera → última
- 10.2024 01.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 1
- Alta 1
Divulgaciones por año
- 2024: 1
- 2025: 0
- 2026: 1
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Laravel Redis Horizontal Scaling Insecure Deserialization esta entrada
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