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Binance and Deribit Revoke SignalPlus API Keys

Binance and Deribit have revoked API credentials connected to SignalPlus after the crypto trading-infrastructure provider reported a potential security issue, highlighting how third-party integrations can create meaningful exchange-account risk even when the exchanges themselves have not been breached. Binance said its internal systems were unaffected and customer funds remained secure, while Deribit said its investigation found no evidence that its systems or data had been compromised. The exchanges nevertheless removed SignalPlus-linked credentials as a precaution, effectively cutting off the platform's ability to interact with connected customer accounts while the security concern is investigated.

By Katharos Intelligence Editorial Team

Source: Katharos Intelligence

November 5, 2026 · 4 min

Market impact: Medium

Binance and Deribit Revoke SignalPlus API Keys

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Crypto Asia / Nov 5, 1:34 PM

Bitget Opens Tokenized Anthropic IPO Subscriptions

Bitget has opened the VIP subscription round for its Anthropic-linked IPO Prime offering, allowing eligible users to commit USDT or USDGO in exchange for prospective tokenized economic exposure to Anthropic shares through an asset designated rANT. The VIP round began on November 5 and runs through November 9, with individual commitments ranging from $100 to $3 million and a total commitment ceiling of $1 billion. The launch expands Bitget's effort to use stablecoins and tokenization as an alternative access route to high-profile equity offerings, but rANT is not equivalent to directly holding Anthropic stock in a brokerage account. Read More...

Security & Scams / Nov 5, 1:28 PM

French Bank Says €100 Million Missing After Cyberattack

French mutual banking group Crédit Mutuel Arkéa says approximately €100 million is missing following a cyberattack that exploited access through an external service provider, marking one of the most financially significant confirmed cyber incidents involving a major European bank this year. The bank says attackers used an account belonging to the institution itself to carry out fraudulent transfers to other banks, while customer accounts and customer assets were not used in the attack. Some of the stolen funds may subsequently have been converted into cryptocurrency through specialized platforms, but the available evidence does not show that cryptocurrency was the original target or attack vector. Read More...

Crypto Asia / Nov 5, 1:16 PM

Visa Builds Singapore Hubs for Stablecoins, AI and Quantum Security

Visa is establishing six global capability hubs in Singapore focused on artificial intelligence, agentic commerce, stablecoins, digital wallets, cybersecurity and quantum technology, consolidating more than 1,500 professionals at its new Solution Center in Paya Lebar Green. The hubs are intended to develop technologies that can be deployed across Visa’s international payment network rather than serve only the Singapore market, giving the city-state a larger role in the company’s global research, engineering and product-development strategy. The announcement does not mean Visa has launched a new stablecoin, autonomous payment network or quantum-secure payment system; it establishes a concentrated development environment for technologies the company increasingly expects to shape the future of commerce. Read More...

Bitcoin / Nov 5, 1:08 PM

Bitquery Onchain Probe Finds Mercado Bitcoin Hack Reached $48.6M

A new blockchain-forensics investigation by Bitquery estimates that $48.6 million was removed from Mercado Bitcoin-linked wallets across 11 blockchains during the November 2 security incident, while thousands of customer deposit addresses continued sending funds to attacker-controlled wallets after the Brazilian exchange publicly said the incident had been contained. Bitquery identified 36,042 Ethereum deposit addresses that were emptied and says the Ethereum sweep continued until 16:56 UTC, approximately four hours after Mercado Bitcoin published its 9:56 a.m. Brasília-time containment statement at 12:56 UTC. The findings materially deepen the technical significance of the breach because they suggest the attacker obtained authority not only over centralized hot wallets but also over a large population of individual deposit addresses controlled through the exchange's wallet infrastructure. Read More...

Bitcoin / Nov 5, 1:43 AM

Mercado Bitcoin Freezes $15 Million After Hack, Plans Limited Reopening

Mercado Bitcoin says more than $15 million in cryptocurrency connected to its November 2 security incident has now been blocked, expanding the amount immobilized through cooperation with stablecoin issuers, blockchain investigators and other crypto-industry participants. The Brazilian exchange also set November 9 as the beginning of a phased customer-access restoration, when users are expected to regain website access to view balances, transaction histories, portfolio holdings and investments. Trading, withdrawals and transfers will remain suspended during that initial stage, making the announcement a meaningful recovery milestone without constituting a return to normal exchange operations. Read More...

Regulation & Policy / Nov 5, 1:01 AM

Ripple Defends Crypto Political Spending After Ohio Loss

Ripple says it intends to remain politically engaged in Washington despite one of the cryptocurrency industry's most expensive electoral defeats, arguing that the performance of the Fairshake super PAC should be judged across its broader portfolio of congressional races rather than by the roughly $56 million effort to defeat Democrat Sherrod Brown in Ohio. Ripple Chief Legal Officer Stuart Alderoty defended the strategy after Brown won the November 3 Senate race, even as Democrats captured both chambers of Congress and several candidates favored by crypto political organizations lost high-profile contests. The response signals that Ripple does not view the 2026 midterms as a reason to retreat from campaign spending. Read More...

Bitcoin / Nov 4, 3:36 PM

Crypto Rallies After Democratic Sweep as Bitcoin Rebounds

Cryptocurrency markets turned sharply higher on Wednesday morning as Bitcoin, Ethereum, Solana and a broad range of altcoins recovered from overnight lows following confirmation that Democrats had won control of both chambers of the U.S. Congress. Bitcoin climbed back above $78,000, Ethereum recovered above $2,320, and Solana moved back toward the mid-$90 range after all three assets traded substantially lower earlier in the session. The timing places the rebound immediately after the U.S. midterm result became clear, but the price action should be described as a post-election risk rebound rather than proof that the Democratic sweep itself directly caused investors to buy cryptocurrency. Read More...

Stablecoins & Payments / Nov 4, 1:52 PM

Circle Revenue Rises as USDC Reserve Income Falls

Circle reported $865 million in third-quarter revenue and reserve income, up 17% from a year earlier, as growth from the Arc blockchain and improving payment infrastructure offset falling income from the reserves backing USDC. Net income from continuing operations reached $226 million, while adjusted EBITDA surged 85% to $317 million, giving the stablecoin issuer one of its strongest headline earnings quarters since becoming a public company. The composition of those results, however, reveals an important shift: USDC reserve income declined 8% even as average circulation increased, while $182 million of revenue from the ARC token presale became the principal reason total revenue grew. Read More...

Regulation & Policy / Nov 4, 1:41 PM

OCC Issues First AI Examiner Framework as Autonomous Financial Agents Raise New Risks

The U.S. Office of the Comptroller of the Currency has issued its first dedicated supervisory framework for bank examiners evaluating artificial-intelligence and agentic systems, marking a significant shift in how federal banking supervision is approaching increasingly autonomous financial technology. The framework tells examiners to focus primarily on the consequences of an AI system’s actions, the degree of authority delegated to it and the amount of human oversight surrounding the use case rather than treating technical sophistication itself as the main measure of risk. Under that approach, a relatively simple agent capable of initiating payments or other financial transactions could warrant more intensive controls than a substantially more advanced model restricted to internal research or analysis. Read More...

RWA / Nov 4, 1:35 PM

Solana Tokenized Stock Trading Hits $657 Million as Backpack Dominates

Tokenized-stock trading on Solana reached a reported $657 million on November 2, more than double the volume recorded on any other single day since September, as blockchain-based equity markets continued expanding beyond their early experimental phase. Backpack-issued securities accounted for approximately $598 million, or about 91% of the reported total, making one provider overwhelmingly responsible for the record day. The milestone demonstrates that tokenized equities can generate substantial turnover on Solana, but the concentration also means the headline figure should not yet be interpreted as evidence of equally broad adoption across the network’s growing number of tokenized-stock issuers and venues. Read More...

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