# Fuel Sequencer Updates (September 2025) security audit

Fuel Sequencer is a Cosmos SDK chain written in Go for Fuel Ignition, an Ethereum layer-2 rollup powered by the FuelVM. This audit reviewed the September 2025 round of updates to the sequencer.

Codezen audited Fuel Sequencer Updates (September 2025) together with Oak Security. Technologies in scope: Golang, Cosmos SDK, Ethereum and Consensus.

- Audit type: Cosmos SDK chain audit
- Technologies: Golang, Cosmos SDK, Ethereum, Consensus
- Ecosystem: Ethereum, Cosmos
- Delivered with: Oak Security
- Report date: 10 September 2025
- Project website: https://fuel.network
- Page: https://www.codezen.tech/audits/fuel-sequencer-updates-september-2025/

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