Cloudflare Workers Spectre Attack Exposed JWT at 12 Bits Per Second

Cybersecurity researchers have uncovered a remote Spectre attack targeting Cloudflare Workers that was capable of extracting a JSON Web Token (JWT) from a co-located Worker in a production environment at speeds of up to 12 bits per second. This represents a significant increase over an earlier attack demonstrated in 2021, which achieved just 2 bits per minute. The researchers conducted an…