dev.to· Sep 1, 2026· by codeant-security

Dissecting FOIS: The Log4j2 Filter That Only Does Half Its Job

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__Log4j2's FilteredObjectInputStream checks which classes can be rebuilt, but not how large...
🎯 Vulnerability: Web Security Vulnerability
💡 Defense Fix: Implement strict input validation, contextual output encoding, and enforce least-privilege authorization controls.
#cybersecurity#security#pentesting#vulnerabilities