Ethereum Fusaka Hard Fork: November Upgrades & Risks

2025-07-22

Ethereum developers are working toward a major milestone: the Fusaka upgrade targeted for November. This upgrade follows the successful Pectra implementation and promises scalability and efficiency enhancements for the blockchain.

However, there are mixed views about its timeline, purpose, and risks. This article explains what the Fusaka hard fork is, how it compares to competitors, and what you should be aware of before anticipating its deployment.

Fusaka Hard Fork: What It Includes and Why It Matters

The Fusaka upgrade package proposes 11 improvements, with EIP-7825 positioned as its anchor. This improvement aims to strengthen network security while also enhancing scalability.

Developers have decided to remove controversial proposals such as EIP-7907 and the EVM Object Format, narrowing their focus on core technical enhancements. These changes are intended to build on the network’s existing strengths after Pectra.

Preparations are underway, with a new development testnet expected to launch this week to incorporate these improvements into pre-deployment testing.

Developer's Plan for The Testnet

Developers have planned two public testnets, one in September and another in October, which they hope will resolve any outstanding bugs or security vulnerabilities before the planned mainnet deployment in November.

This timeline is aggressive, leading some developers to raise concerns about rushing without comprehensive testing.

Nonetheless, internal teams remain confident, driven by Ethereum’s broader ambition to increase transaction throughput and reduce congestion.

It is worth noting, however, that the current public information about Fusaka remains limited, and even the whitepaper on the official website is inaccessible at the time of writing.

Therefore, despite its promising features, caution is advised when making investment or development decisions based purely on preliminary announcements.

Competitor Comparison: How Fusaka Matches Up

The upcoming Fusaka upgrade will likely be compared to developments on other major Layer 1 blockchains such as Solana, Avalanche, and Cardano.

For example, Solana is known for its high transaction throughput but has faced frequent network outages. A

valanche, meanwhile, has optimised subnets to reduce congestion, while Cardano focuses on gradual, academically reviewed upgrades for stability.

Ethereum and Fusaka

Ethereum’s Fusaka hard fork targets the same problems: scalability and congestion. The proposal to raise the gas limit from 30 million to 45 million, supported by many validators, is another step towards reducing transaction backlogs during peak periods.

However, the November launch’s compressed timeline may compromise testing depth compared to Cardano’s conservative approach.

Looking further ahead, Ethereum developers have already outlined their plans for the Glamsterdam upgrade in 2026, which could cut block times in half and dramatically boost decentralised finance performance.

Still, competitors are also innovating rapidly, meaning Ethereum must balance speed with security and stability if it wants to maintain its dominance in decentralised applications and institutional blockchain infrastructure.

Risks, Timelines, and What to Expect Next

According to current reports, the Fusaka hard fork is scheduled for mainnet deployment just ahead of Devconnect in Buenos Aires on November 17.

The two public testnets in September and October will be crucial in determining whether the upgrade is ready for launch without significant technical issues.

However, there is a note of caution to consider. Even though Ethereum’s development team has successfully delivered past upgrades, the compressed timeline for Fusaka increases the risk of unexpected bugs or vulnerabilities slipping through.

The Whitepaper's Timelines

The inaccessibility of the whitepaper also raises questions about transparency and public readiness to understand the exact impact of Fusaka’s proposed features.

Investors, developers, and users should continue to follow official announcements closely in the coming months.

Testing outcomes and validator community sentiment will likely determine whether the November target is achievable or if a delay becomes necessary to ensure network stability and security.

Conclusion

Ethereum’s Fusaka hard fork is an ambitious upgrade aiming to improve scalability, efficiency, and security. Its November target reflects Ethereum’s accelerated development path as competition among Layer 1 blockchains intensifies.

However, risks remain, particularly with the tight timeline and limited public information about Fusaka’s full technical scope. Stakeholders are advised to remain cautious and seek updated details before making decisions related to the upgrade.

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