In-memory Data Structure Store Vulnerability in Redis by Redis Labs

CVE-2026-25243

What is CVE-2026-25243?

CVE-2026-25243 is a vulnerability identified in Redis, a popular open-source in-memory data structure store widely used for caching, databases, and messaging. This specific flaw is present in versions of redis-server prior to 8.6.3 and relates to the RESTORE command, which allows for the restoration of serialized data from backups. The vulnerability arises due to insufficient validation of serialized values, enabling an authenticated attacker who has permission to execute the RESTORE command to craft and supply malicious serialized payloads. This can lead to invalid memory access, which may ultimately result in remote code execution. Such exploitation could severely compromise the integrity and security of an organization’s systems, potentially leading to unauthorized access to sensitive data and control over critical services.

Potential impact of CVE-2026-25243

1. Remote Code Execution: The most severe impact of this vulnerability is remote code execution, which allows attackers to execute arbitrary code on the affected Redis server, potentially leading to full system compromise.

2. Data Breach Risks: Given the nature of Redis as a data structure store, exploitation could lead to unauthorized access to sensitive data stored within, causing significant risks regarding data confidentiality and compliance failures.

3. Service Disruption: By exploiting this vulnerability, attackers could disrupt the availability of services relying on Redis, affecting applications, downstream processes, and overall business operations, thereby resulting in substantial downtime and economic loss.

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