The Polylog Crypto Intelligence Brief

Morning Edition · Thursday, August 27, 2026

Crypto

StarkWare Moves 3.1 Bitcoin in What It Calls the First Quantum-Safe Mainnet Spend

The transaction used hash-based signatures inside existing Bitcoin Script, so it required no soft fork. The same day, Ethereum developers published a draft proposal to retire quantum-vulnerable validator keys.

4 sources
Corroborated

Crypto

Aztec Discloses Critical Soundness Flaw in Its Alpha v5 Proving System

Core contributors say an attacker could construct a proof that passes verification for a transaction the network should reject, and they cannot rule out that it was used before discovery.

2 sources
Corroborated

Crypto

SEC Sends a Crypto Custody Proposal to the White House

The agency is reviving a rule the previous administration failed to complete, and the substance is not yet public.

2 sources
Corroborated

Crypto

Solana Cuts Block Spacing to About 365 Milliseconds in First Step Toward Sub-Second Finality

Epoch 1021 averaged 365.4 milliseconds between slots with a 0.077% skip rate, while the next reduction stage remains unreleased.

1 source
Corroborated

Crypto

JPMorgan Weighed Its Own Stablecoin as State Banks Build a Shared Blockchain

The bank says it has no plans to issue one, while 39 state banking groups work on a network for digital payment products and Visa tests issuance with South Korea's Shinhan.

3 sources
Corroborated

Crypto

Coinkite Forces Dice Rolls on New Coldcard Seeds After Entropy Bug Drained Bitcoin Wallets

A build configuration error from a March 2021 firmware release left seed generation relying on a weak software random number source, and attackers began brute-forcing the results on July 30.

2 sources
Corroborated

Crypto

Miden Will Issue a Private USDC-Backed Stablecoin Using Circle's Reserve Infrastructure

USDCx transactions are confidential by default, with selective proofs of balance and provenance available to auditors, regulators and counterparties.

1 source
Corroborated

Crypto

Security Roundup: Governance Takeover, Hot-Wallet Drain and 40 Malicious Firefox Extensions

Term Labs lost $8.5 million to an attacker who bought voting power, Coinsbuy lost $7.9 million to what investigators call key or admin compromise, and researchers found a browser extension campaign built to harvest recovery phrases.

4 sources
Corroborated

Crypto

Bitcoin Slips Below $79,000 as Traders Start Pricing a Fed Rate Increase

Every large token except Solana and BNB was flat or lower over 24 hours, even as bitcoin held a 14% weekly gain and exchange-traded funds took in new cash.

4 sources

Crypto

Research Finds Uniswap v3 Depth Behaves Like a Single Pool Despite Many Fee Tiers

Across 78 Ethereum token pair families, the median number of pools that actually contribute usable capacity was 1.076.

2 sources
Plausible

Crypto

Cardano and Solana Votes Expose How Little Participation Decides Chain Policy

Cardano's delegated representatives and stake pool operators sit below participation thresholds while Solana weighs proposals that would cut about $1.5 billion in annual token issuance.

2 sources
Corroborated

Crypto

Coinbase and Better Open Bitcoin-Backed Mortgages to Qualified US Buyers

The product uses two loans, one secured by bitcoin for the down payment and a conventional mortgage on the house, so borrowers keep their coins.

3 sources
Corroborated