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Test your applicationsUpgrade redis-namespace to version 1.0.4, 1.1.1, 1.2.2, 1.3.1 or higher.
redis-namespace is a gem that adds a Redis::Namespace class which can be used to namespace calls to Redis.
Affected versions of this package are vulnerable to Arbitrary Code Execution. Affected versions contains a flaw in the method_missing implementation. The issue is triggered when handling exec commands called via send(). This may allow a remote attacker to execute arbitrary commands.