Mert Özen Further With Every Line

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Mert Özen's blog posts on software development, backend, frontend, and DevOps.

ALL All 274 posts
BE Backend 36 posts
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DO DevOps 29 posts
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.NET Core Web API 36 Angular 31 JavaScript Basics 19 JavaScript Intermediate 18 JavaScript Advanced 16 TypeScript Basics 14 TypeScript Intermediate 14 TypeScript Advanced 12 Entity Framework Core 28 Dapper 16 Git & GitHub 29 Web Security (OWASP Top 10) 21 LLM Fundamentals 20
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OWASP A08: Software or Data Integrity Failures — Deserialization and Mass Assignment
Security PART 14

OWASP A08: Software or Data Integrity Failures — Deserialization and Mass Assignment

We explain conceptually why letting incoming data choose its own type is dangerous, and show with real output how BinaryFormatter ends on net10.0 with a build error and a PlatformNotSupportedException. We set up allow-list polymorphism in System.Text.Json, close mass assignment with DTOs and JsonUnmappedMemberHandling, and look at code integrity through CI/CD and SRI.

6 Nov 2026 9 min 8
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