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Test your applicationsUpgrade activestorage to version 7.2.3.1, 8.0.4.1, 8.1.2.1 or higher.
Affected versions of this package are vulnerable to Glob Injection via the DiskService#delete_prefixed function. An attacker can delete unintended files from the storage directory by supplying blob keys containing glob metacharacters that are passed unescaped to Dir.glob.