Key updates in June 2026 include Bitcoin Core's privacy fix, Glamsterdam upgrade delay, and Solana SIMD proposal progress.
As the blockchain technology landscape continues to evolve, June 2026 has offered significant developments worth noting. Notable updates include a crucial fix for Bitcoin Core's privacy vulnerability, the delay of the ethereum-foundation-announces-updates-for-glamsterdam-upgrade/">Glamsterdam upgrade, and promising progress in Solana's SIMD proposals.
Bitcoin Core has officially announced a privacy vulnerability affecting the newly implemented -privatebroadcast feature in version 31.0. Under certain network conditions, this issue could inadvertently disclose the IP address of the transaction initiator to the receiving node. A patch is expected with the upcoming version 31.1.
The vulnerability arises when Bitcoin Core selects an IPv4 or IPv6 node that supports BIP324 v2 transport. Should the v2 handshake fail, Bitcoin Core defaults to an older version v1, inadvertently bypassing the Tor proxy and establishing a direct connection via the clear web. The range of affected nodes includes those that have -privatebroadcast activated and utilize the sendrawtransaction RPC.
Bitcoin Core recommends users concerned about this vulnerability to disable the -privatebroadcast feature, deactivate v2 transport, or route outbound IPv4/IPv6 traffic through Tor before upgrading to version 31.1.
In conjunction with the bug fix, the Bitcoin Core v31.1rc1 release includes multiple enhancements, performance improvements, and essential translation updates. Users can download this release from the official Bitcoin Core website. Besides addressing the IP leakage under the -privatebroadcast feature, the new version also boasts fixes across various modules, including P2P networking, wallet migration, and testing improvements.
Alongside the privacy fix, developers have entered discussions regarding the potential removal of explicit Replace-by-Fee (RBF) signaling from the Bitcoin Core wallet. As full-RBF has become standardized, it raises questions about the necessity of the BIP 125 RBF signal. This change would minimize unnecessary on-chain fingerprints, enhancing user privacy.
The anticipated Glamsterdam upgrade, focused on enhancing Layer 1 scaling and maximizing MEV fairness, has encountered delays. The mainnet activation is now anticipated for the latter half of the year, with ongoing developments on Devnet-5 and Devnet-6 aimed at counteracting proposed new Ethereum Improvement Proposals (EIPs).
In the meantime, the Hegota upgrade is progressing steadily. The team is concentrating on elements such as censorship resistance, privacy enhancement, and node slimming. Aiming for completion between late 2026 and early 2027, they have decisively rejected EIP-8222, which focused on mandatory private staking, to better align with their vision of ultimate censorship resistance.
Amid various advancements, Solana’s SIMD (Single Instruction, Multiple Data) proposals are on the verge of completion. Specifically, SIMD-123 has passed and is approaching the code-completion stage. Two other proposals, SIMD-547 and SIMD-553, are progressing concurrently, while SIMD-550 has gained concept approval from Anza.
These proposals, when implemented, could dramatically impact SOL inflation rates, increasing the disinflation rate from 15% to 30%. Updated projections suggest that under current price assumptions, token emissions could decrease significantly, potentially saving around $1.36 billion over a span of six years. Moreover, the average daily SOL burn could climb from approximately 650 SOL (valued at $47,000) to as high as 9,000 SOL (approximately $646,000).
Ethereum researchers have made headway with a plan to establish a post-quantum public key registry for validators, facilitating a gradual transition from BLS signatures to quantum-secure signature schemes. This phased migration is part of a broader trend within the Ethereum ecosystem, with the Hegotá hard fork upgrade set to integrate EIP-8182, which aims to introduce a protocol fee-free private transfer feature.
Joseph Lubin, CEO of Consensys, projected that Ethereum could transform into a fully zero-knowledge proof-based protocol within the next three to five years, further enhancing scalability and composability between Layer 1 and Layer 2 solutions.
In addition, Starknet is launching STRK20, a zero-knowledge proof privacy framework enabling ERC20 assets to benefit from confidential transfer features. The first asset to adopt STRK20 will be strkBTC, highlighting Starknet’s commitment to privacy enhancement through innovative technology.
The Ethereum L2 network, Base, recently implemented its second upgrade, Beryl, transitioning the B20 token standard to enhance asset issuance capabilities within the Base ecosystem. Plans to shorten withdrawal times from seven days to five days also mark a significant efficiency improvement.
As Polygon prepares to cease operations on the zkEVM Mainnet Beta by July 1, 2026, users are urged to withdraw their assets in time, as funds may become irretrievable after the shutdown.
On the infrastructure front, Arbitrum is evolving from being a mere scaling solution to establishing itself as a cornerstone of global financial markets. The roadmap indicates a shift toward incorporating KYC/AML compliance tools and enhance privacy features amid their innovative treaty process across various blockchains.
While excitement builds around blockchain advancements, it is crucial to remain aware of vulnerabilities. Recent alerts from the SlowMist Security Team, cautioning against new malware variants targeting npm ecosystems, stress the importance of vigilance and security practices, including two-factor authentication.
Lastly, advancements in quantum computing remain pertinent, as Microsoft unveiled its second-generation topological quantum chip, Majorana 2. With substantial reliability improvements, the chip could pave the way toward scalable quantum computing innovations by 2029.
The developments of June 2026 underscore the relentless innovation and cyclical nature of the blockchain industry. As Bitcoin Core addresses vulnerabilities, Ethereum initiatives push towards quantum resistance, and Solana's proposals reshape token economics, the future remains bright. The community's focus on privacy upgrades, scalability, and compliance measures will likely drive even more significant changes in the months to come, reinforcing blockchain technology's role in the evolving digital economy.
What are the recent developments in Bitcoin Core? Bitcoin Core has fixed a privacy vulnerability in version 31.0, with version 31.1 set to address network security issues related to IP address leakage.
Why has the Glamsterdam upgrade been postponed? The Glamsterdam upgrade's mainnet activation has been pushed to the latter half of 2026 due to ongoing developments needed to counter new EIPs.
What advancements are being made in Solana’s SIMD proposals? Solana's SIMD proposals, particularly SIMD-123, are nearing completion, with potential changes to SOL tokenomics aimed at reducing inflation and increasing average token burn rates.