Sandbox Token Issued Investment Warning by South Korea's Largest Exchanges
The Sandbox token has been issued an investment warning by South Korea's two largest crypto exchanges, Upbit and Bithumb. The warning comes after a security breach was reported on August 24, 2026, where an attacker gained unauthorized minting permissions on a Base-chain bridge contract linked to The Sandbox.
According to the source, over 500 million SAND tokens were minted abnormally on Base before the figure climbed further. The Sandbox project stated that it identified and fully contained the flaw, but Ethereum and Polygon holdings were unaffected. Bridging between Base and BNB Smart Chain was disabled to isolate the unbacked supply.
Despite the project's claims of containing the vulnerability, Upbit and Bithumb have chosen not to wait for a final post-mortem before acting. This is the reasoning behind the fresh Investment Caution Asset label applied on August 24.
The designation will be reviewed by Bithumb between September 28 and October 2, 2026, when it will decide whether to lift, extend, or terminate its caution designation. Until then, both Upbit and Bithumb are treating SAND as a high-risk asset under active review.