StablR's EURR and USDR stablecoins fell off-peg during an ongoing exploit that Blockaid said was likely caused by a compromised private key tied to the minting multisig. Blockaid estimated about $2.8 million has been extracted after the attacker minted 8.35 million USDR and 4.5 million EURR and swapped the tokens for 1,115 ETH amid thin liquidity.

The tokenized asset market has climbed to $34.01 billion, with tokenized U.S. Treasury products emerging as the largest segment and approaching $16 billion by May 2026. The market was below $3 billion around mid-2024, indicating more than a tenfold expansion over the period. Commodities neared $6 billion and asset-backed credit topped $3 billion as broader institutional use of onchain settlement systems increased.

Binance CEO Richard Teng said on May 21 that tokenization is nearing a major inflection point as regulation, institutional connectivity, real-world adoption, and market infrastructure begin to align. He added that regulatory frameworks are moving toward operational rules for tokenized finance in 2026, and argued the next 12–18 months could be decisive for how tokenized markets develop.

Polymarket said a security incident on May 22 led to roughly $520,000–$700,000 in crypto being siphoned from an internal operations wallet, while user funds and core smart contracts were not affected. The activity was flagged after large outflows on Polygon (POL), with reports of about 5,000 POL withdrawn every 30 seconds from addresses tied to its UMA CTF Adapter. The team said it rotated keys and later recovered about $164,000 while trading and market resolutions continued normally.

In May 2026, the real-world asset (RWA) tokenization market climbed to nearly $34 billion, excluding stablecoins, as institutions increasingly used blockchains for yield, collateral, and settlement. Tokenized U.S. Treasury bonds accounted for roughly half of the sector, while BlackRock's BUIDL fund rose above $1.7 billion and Franklin Templeton's FOBXX also contributed to growth.

The European Central Bank told EU finance ministers on Friday that proposals to expand euro stablecoin issuance could weaken bank lending and make monetary policy harder to run. The discussion followed a Bruegel paper presented at a two-day Ecofin meeting in Nicosia that suggested easing liquidity rules for issuers and potentially giving them access to ECB funding.

On May 23, 2026, Rio de Janeiro Civil Police said a raid targeting a Comando Vermelho operational nucleus uncovered a small crypto-mining room with about 30 computers on shelving inside what appeared to be an abandoned lot. Investigators said the site drew electricity from an illegal line connected directly to a utility pole, using high-capacity cooling and remote-monitoring equipment. Authorities are examining whether the structure was linked to moving or laundering funds.

Italy’s crypto capital-gains tax rate rises to 33% for 2026 transactions, while 2025 gains filed in 2026 remain taxed at 26% and the former €2,000 allowance is no longer available. The first payment installment is due by June 30, 2026 (or July 31 with a 0.40% surcharge), and from January 1, 2026 DAC8 requires EU-licensed platforms to automatically transmit user data to Italy’s tax authority.