# Google finds AI bug hunting and fuzzing uncover different V8 vulnerabilities

_Published Tuesday, October 27, 2026 at 2:02 PM EDT · Security, AI · Latest · Tier 2 — Notable_

![Google finds AI bug hunting and fuzzing uncover different V8 vulnerabilities — Primary](https://projectzero.google/images/preview_image.png)

Google Project Zero found that its BigSleep AI system identified 45 actionable V8 vulnerabilities over six months, compared with 37 for Fuzzilli, a tool that generates JavaScript tests to uncover bugs. Both systems automatically examine Chrome's JavaScript engine in production.

Bug records showed roughly 25% overlap, while dedicated experiments estimated roughly 60%. Either result leaves vulnerabilities that only one approach discovers, supporting the use of both methods. The researchers could not make a reliable cost-per-bug comparison because neither system was optimized for that measure.

## Sources

- [Project Zero](https://projectzero.google/2026/10/fuzzing-v-AI.html)

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Canonical: https://techandbusiness.org/newswire/qCHPllCou1Oxeq5NRdHZWt
Published: 2026-10-27T18:02:15.112Z
Story chronology: 2026-10-27T07:00:00.000Z
Retrieved: 2026-10-27T20:41:04.097Z
Publisher: Tech & Business (techandbusiness.org)