Arjun vs ysoserial: 2026 Comparison
Arjun is a free penetration testing tool. ysoserial is a free penetration testing tool. Compare features, ratings, integrations, and community reviews side by side to find the best penetration testing fit for your security stack.
CST VerdictBased on our analysis of available product data, here is our conclusion:
Pentesters and bug bounty hunters who need to enumerate hidden HTTP parameters fast will find Arjun indispensable; it discovers parameters that manual fuzzing misses by testing thousands of candidates against common wordlists. The 5,800+ GitHub stars and active community indicate sustained real-world adoption among practitioners who value speed over UI polish. Skip this if you need a full-featured burp suite alternative or graphical workflow; Arjun is a focused CLI tool that does one thing exceptionally well.
Penetration testers and red teamers validating Java deserialization vulnerabilities need ysoserial for its breadth of gadget chains; with 8,501 GitHub stars and active community contributions, it remains the de facto standard for generating CVE-2015-6420 and related payloads across legacy and modern Java frameworks. The tool's strength lies in its ability to craft working exploits against unsafe ObjectInputStream implementations without requiring live target interaction during payload generation. Skip this if your scope is limited to .NET or Python applications, or if you need a guided UI; ysoserial is command-line native and demands familiarity with Java serialization mechanics.
