LLMs Upgrade Logic Vulnerability Fuzzing
dolby360 · reddit · 2026-07-10
The author believes that using LLMs for logic vulnerability fuzzing has taken vulnerability research "to the next level."
They compare the goals and limitations of traditional fuzzing:
- Previously, it focused heavily on crash-type vulnerabilities in C/C++, such as buffer overflows and UAF.
- In languages like Python, it often just throws exceptions, making it less appealing.
The shift now is that research can move from "chasing crashes" to "chasing business logic," using LLMs to compromise systems through logic vulnerabilities. The author mentions seeing a project that proves this is viable, but emphasizes that the effectiveness heavily depends on how well the harness for the specific scenario is built.
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