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).
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History
Fri, 23 Jan 2026 16:45:00 +0000
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Laravel
Laravel reverb |
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Laravel
Laravel reverb |
Thu, 22 Jan 2026 23:00:00 +0000
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ssvc
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Wed, 21 Jan 2026 22:15:00 +0000
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| Description | 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). | |
| Title | Laravel Redis Horizontal Scaling Insecure Deserialization | |
| Weaknesses | CWE-502 | |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-01-21T22:07:55.682Z
Updated: 2026-01-22T16:49:37.182Z
Reserved: 2026-01-13T18:22:43.980Z
Link: CVE-2026-23524
Updated: 2026-01-22T15:13:35.611Z
Status : Received
Published: 2026-01-21T22:15:50.280
Modified: 2026-01-21T22:15:50.280
Link: CVE-2026-23524
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