BNB Chain Sets BNB (BNB) Pasteur Hard Fork for August 25

BNB (BNB), the native asset of the BNB Smart Chain ecosystem, is two days out from a major network milestone: the Pasteur hard fork is scheduled to activate on the mainnet at 02:30 UTC on August 25, 2026. The upgrade is designed to strengthen bridge verification, place validator key rotation on safer footing, and add more room to every block. The BNB Chain team framed Pasteur as a deliberate departure from this year's earlier speed-focused releases — Fermi, which activated in January, cut block times to 0.45 seconds, and the April Osaka and Mendel forks stabilized the network at that pace. Pasteur instead uses that existing speed more productively while closing two ways a validator could hold onto authority it should not retain. The fork ships three proposals grouped under the BEP-673 package. BEP-682 hardens bridge verification, BEP-695 ensures validator keys are properly retired, and BEP-675 enables fuller blocks at the same block interval. Under BEP-675, a block builder can forward a block it has already executed; the validator checks it against consensus rules, signs and broadcasts it, then completes full verification afterward. Testnet benchmarks show throughput climbing from 1,237 to 2,324 transactions per second, and the fork has been live on the BSC testnet since July 21. The same release notes position BEP-675 at the center of the H2 2026 capacity roadmap, and the first-half progress — block intervals cut to 450 milliseconds and in-memory finality to 650 milliseconds — sets the base for the doubling targets. Node operators have been instructed to upgrade to client version v1.7.7 before the activation date, and the team describes the fork as a stepping stone toward a 10x improvement across the BNB Chain network.

With the countdown at two days, the BNB Chain official account posted its own warning on August 22, saying that “heavy upgrades are coming” and distilling the fork into three headline benefits: stronger bridge verification, safer validator key rotation, and more room in every block. The notice repeated the v1.7.7 requirement for node operators and directed them to the full upgrade documentation. It also framed the wider ambition — in the first half of 2026, BSC cut block intervals to 450 milliseconds, brought in-memory finality to 650 milliseconds, and nearly doubled benchmark throughput to about 5,200 TPS. The second-half objective is to double mainnet throughput again, with BEP-675 serving as the capacity workstream in that roadmap and Pasteur as its on-chain delivery mechanism. The team's public messaging has been consistent: this is not a standalone patch but the next step toward a stated 10x improvement. The most contested detail in the design is the deferred full-verification model — the validator signs and broadcasts on the strength of consensus rules, then completes full verification of the block's contents afterward. That mechanism is what lets blocks carry more transactions without lengthening block time, and it is directly reflected in the testnet TPS jump from 1,237 to 2,324. For node operators, the practical requirement is unambiguous: upgrade to v1.7.7 before the August 25 deadline or risk falling out of sync the moment the fork activates at 02:30 UTC. Community countdown posts mirroring the network's own timeline underscore how closely infrastructure changes are being watched ahead of the mainnet switch.

COINOTAG's read: Pasteur consolidates BNB Chain's two goals — faster blocks and fuller blocks — into one coordinated release. The official changelog pins activation to 02:30 UTC on August 25, 2026, and makes the operator impact explicit: every node must run v1.7.7 before that timestamp or drop out of consensus. The efficiency gain matters across market regimes, and it carries extra weight in bear-market stretches when operators weigh every compute cost. For a top-tier altcoin like BNB, execution quality here carries as much weight as price action, since block-level efficiency feeds directly into the transaction costs and confirmation times observed on-chain. Set against the H2 target of doubling mainnet throughput, the fork is the enabling layer for the 10x roadmap, and its success will shape how automated market makers and other high-frequency applications on the chain scale.