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Nightmare of the Javascript Optimization

Researcher discloses working WebAssembly memory exploit for Ladybird browser achieving arbitrary read/write via typed array abuse and memory grooming.

Sunday, April 26, 2026 12:00 PM UTC2 MIN READSOURCE: LobstersBY sys://pipeline

A researcher discloses a complete, working exploit chain for a WebAssembly memory corruption vulnerability in the Ladybird browser engine. The exploit uses fake typed arrays and memory grooming to achieve arbitrary read/write, demonstrated via proof-of-concept JavaScript code.

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