LLMs as Next‑Gen Fuzzers

Updated: 2026.03.07 7H ago 1 sources
Large language models can automatically generate crashing inputs and surface logic errors across large codebases, finding many bugs that decades of fuzzing and static analysis missed. In short tests, an LLM produced hundreds of unique crashing inputs and identified distinct classes of logic bugs beyond conventional fuzzers' reach. — If LLMs routinely uncover longstanding, high‑severity bugs in widely used software, that changes how vendors, open‑source projects, regulators, and attackers approach software security, liability, and disclosure practices.

Sources

How Anthropic's Claude Helped Mozilla Improve Firefox's Security
EditorDavid 2026.03.07 100% relevant
Anthropic says Claude Opus 4.6 found more than 100 Firefox bugs (14 high severity) in two weeks and supplied reproducible test cases that let Mozilla patch issues within hours.
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