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# System prepended metadata

title: EPF Cohort 4 - Week 11

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Hello everyone! Here's my development update for Week 11 of Ethereum Protocol Fellowship Cohort 4!

## Here's my progress for the week:

- I've found a bug that cause a security vulnerability, I've spent the week researching and testing the vulns I could provoke from this bug. I measured the impact and sent a report to the ethereum security bounty program and did a POC.Unfortunately, I can't give any details until the potential vulnerability has been corrected.All I can say is that I've spoken to Fredrik about it and it seems to be a good find! 

- Having spent most of the week on the bug I mentioned earlier, I haven't been able to spend much time adding functionality to my fuzzer but I have still been able to add two new fuzzed messages and their commands!

- I've also found 3 new bugs that are spec non compliance issues that I've added to the issues I've already opened! 

## Next Steps

- The vulnerability I reported should probably be dealt with this week.
- I intend to continue adding messages and commands to my fuzzer.
- I will update the fuzzer documentation with the new messages and commands.