Nostra Finance $3.5M Exploit: 8,000x Oracle Pump Drained Starknet Money Market

On September 17, 2026, Starknet lending protocol Nostra Finance halted operations after an attacker borrowed about $3.5M against NSTR collateral. GoPlus Security said the NSTR oracle price rose from $0.006 to $49.5, roughly 8,000x, via a fake pool and wash trading. Nostra's TVL fell from $4M to $710K.

• NSTR oracle price rose from $0.006 to $49.5 in minutes
• About $3.5M borrowed against NSTR worth ~$547K at market price
• About $1.92M already bridged to Ethereum, including 234.57 ETH and 1.3M DAI
• Nostra TVL fell from $4M to $710K after full protocol halt