The Polylog Crypto Intelligence Brief

Morning Edition · Sunday, September 13, 2026

Crypto

Aztec Says a Flaw in Its Alpha V5 Proving System Can Validate Transactions the Network Should Reject

Core contributors found the defect on 27 July through internal AI-assisted auditing, cannot rule out prior exploitation, and have scheduled the fix for the next network version.

3 sources
Corroborated

Crypto

Blockstream Demands the 598 Bitcoin Liquid Attackers Kept as a Self-Declared Finder's Fee

The group returned 3,400 of about 4,000 bitcoin taken from the sidechain's federation wallet, keeping exactly 15 percent and worth roughly $47 million.

3 sources
Corroborated

Crypto

Miden Sets Out a Private-by-Default Finance Stack Around a Circle-Backed Stablecoin

USDCx will be issued natively on Miden against USDC held in reserve contracts that Circle deploys and operates directly, with no third-party bridge in the path.

2 sources

Crypto

A Deprecated ether.fi Contract Drained Eleven Wallets Through a Missing Caller Check

The loss was about 15.45 ether, roughly $38,000, and researchers published a working proof of concept a day later as the year's exploit total passed $1.3 billion.

5 sources
Corroborated

Crypto

Revolut Handed Passports and Full Bitcoin Histories to an Attacker Posing as a Government Agency

No customer funds were taken, and no system was breached, because the bank processed the fraudulent request through its normal legal channel.

3 sources
Corroborated

Macro

Rate Traders Put 85 Percent Odds on a September Hike as Bitcoin Holds Below $80,000

Gasoline drove most of August's headline inflation jump, but faster monthly core inflation kept the case for tightening alive ahead of Wednesday's Federal Reserve decision.

4 sources

Crypto

Thailand Proposes Barring Stablecoin Withdrawals to Anyone but the Customer's Own Verified Wallet

The draft also caps transfers at five million baht a day, about $151,000, and the regulator cited growth in Tether volume as part of its reasoning.

2 sources
Corroborated

Crypto

Britain Gives Crypto Firms Five Months to Apply as European Banks Move on Custody

The Financial Conduct Authority window runs from 30 September to 28 February, and UniCredit is reported to be preparing a digital-asset custody service.

3 sources

Crypto

Ripple's Stablecoin Chief Puts a $13 Trillion Corporate Treasury Number on a $2.4 Billion Token

Jack McDonald says payments and capital markets are driving RLUSD growth as Ripple prepares to bring the token into Europe under the bloc's crypto rules.

2 sources

Crypto

The Paper Trail Behind a Hardware Wallet Undermines the Privacy the Device Promises

Buying a self-custody device requires giving a company a name and a delivery address, creating a record that links a person to the fact that they hold keys.

2 sources

Tech

The Bank for International Settlements Says AI Can Cut a Bank's Patching Window to Minutes

The paper lands the same week Aztec credited AI-assisted auditing with finding a critical flaw in its own proving system, and the same week three frontier AI chief executives called for slowing development.

3 sources
Corroborated

World

Two Crypto Billionaires Gave Reform UK £72 Million in a Weekend and the Metropolitan Police Opened an Inquiry

Ben Delo of BitMEX and investor Christopher Harborne each gave £36 million, and reporting describes the combined sum as exceeding all British party donations recorded in 2025.

3 sources
Corroborated