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Article
Flash

first_img Arbitrum Security Committee urgently suspended the activation of the new contract Stylus and added BoLD protection

On October 2, at 11:30 AM Eastern Time, the Arbitrum Security Committee executed an emergency upgrade on Arbitrum One and Nova, suspending the activation of all new Stylus contracts on both chains, while adding a protective mechanism against BoLD single-step proofs in the dispute system of Arbitrum One. The Arbitrum Foundation stated that this action is part of ongoing proactive security measures aimed at protecting the security and integrity of the network.Stylus allows developers to write smart contracts using languages such as Rust and C++, while maintaining compatibility with the Ethereum Virtual Machine, with its programs compiled into WebAssembly format. This suspension primarily targets manually written WASM programs that do not use the standard Stylus compiler toolchain and have not yet been patched by the current version of ArbOS. The Security Committee increased the gas required for activation to the theoretical maximum by calling ArbOwner.setWasmActivationGas(2^64 - 1), making new activations economically unfeasible. Activated Stylus contracts are unaffected and can continue to execute and renew, and the deployment and execution of Solidity contracts are also unrestricted.The newly added BoLD protection allows anyone to pause the settlement from Arbitrum One to Ethereum when two conflicting and accepted answers appear in the same dispute step, which may delay unconfirmed withdrawals to allow the Security Committee to deploy fixes. Officials pointed out that the currently discovered Stylus-related vulnerabilities mainly affect the activity of the chain, such as denial-of-service attacks, and do not jeopardize user funds.

first_img The CFTC submitted two rules, intending to include event contracts in the definition of swaps

According to CoinDesk, the U.S. Commodity Futures Trading Commission (CFTC) has submitted two rules for review to the Office of Management and Budget (OMB). One rule aims to include event contracts within the regulatory definition of swaps, while the other is a "temporary final rule" that seeks to exclude "casino-style gambling products" from the scope of swaps.These two rules were received by the OMB this week, with the document dated September 28. OMB review is typically the last step before rules are submitted for public comment, and the temporary final rule will take effect immediately while allowing for subsequent public input and revisions.This move comes as the CFTC engages in a tug-of-war with multiple states over the nature of prediction markets. Event contracts are typically binary yes-or-no bets on measurable outcomes such as sports events and elections. Last week, the U.S. Sixth Circuit Court of Appeals ruled that Kalshi's sports contracts do not fall under swaps and should be governed by state gambling regulations, while the Eighth Circuit Court of Appeals made a similar ruling; however, the Third Circuit Court of Appeals previously determined that the CFTC has jurisdiction over prediction markets, creating a legal divergence at the federal level. CFTC Chairman Mike Selig believes that the CFTC has exclusive jurisdiction over prediction markets.If event contracts are classified as swaps and not as gambling products, it could weaken the positions of various states in multiple lawsuits against prediction market platforms like Kalshi. The CFTC is legally required to consist of five commissioners, but President Trump has yet to nominate additional commissioners, leaving Selig as the sole commissioner, who is unilaterally advancing regulatory and policy decisions. Additionally, information disclosed by the OMB indicates that the CFTC recently submitted a "pre-rule" focusing on cryptocurrency regulation to the White House.

first_img OpenAI: Safety justification should be submitted before cutting-edge reinforcement learning training

On September 28, 2026, OpenAI published a safety-related article, stating that before continuing any cutting-edge reinforcement learning training, structured safety documentation should be required. Ideally, such documentation should reach the evidence-based structured risk argument level used in safety-critical industries like aviation and nuclear power. OpenAI views this as a direction for effort while acknowledging the complexity arising from the emergence of AI capabilities, making it difficult to achieve the same level of rigor.The article focuses on cutting-edge reinforcement learning training and does not cover the broader alignment attributes required for internal and external deployments. The recommendations in the article reflect current practices, which are expected to continue evolving and are being implemented internally at OpenAI. Technical safeguards should cover model alignment, isolation, and monitoring, including avoiding speculative positive reinforcement rewards, offline alignment assessments and stress testing, preventing automated scorers from seeing thought chains, as well as multi-layer infrastructure security, sandbox red teaming, limiting high-bandwidth cross-sample communication, and immutable preservation of agent records.Operational guidelines include preemptive dissent across teams, approvals that can be vetoed by senior leadership, accountability of training leads for safety arguments and incident responses, as well as fail-safe pauses, internal oversight, audit access, and escalation by severity. In response to serious misalignment events, OpenAI proposes controlled access to original records, root cause analysis, operational and cultural reviews, and treating incident-derived assessments as regression tests; results of investigations should be made public, along with reviews and operational changes, and affected third parties should be notified as soon as possible.
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